無料ダウンロード x^2 y^2=25 a function 335008-X^2+y^2=25 a function

Similarly, x 2 y 2 =25 can define y as a function of x if you make a choice of sign for y, either y=sqrt (25x 2) or y=sqrt (25x 2 ) It's a subtle but important distinction between functions, equations or formulas which define them, and also their x 2 y 2 = 25,consider a very magnified neighbourhood of the curve at any point excepts the points x = 5, − 5In that neighbourhood there can be defined as function f such that y = f (x) where y satisfies the given relationNow express y in terms of xTake one of f (x) = − (25 − x 2) or f (x) = 25 − x 2then differentiate like a function,you will ultimately get the same resultAs seen in Example 3, the equation x 2 y 2 = 25 does not define y as a function of x Each graph in these exercises is a portion of the circle x 2 y 2 = 25 In each case, determine whether the graph defines y as a function of x, and if so, give a formula for y in terms of x

The Reduced Inclusive Dis Cross Section Plotted As A Function Of Y 2 Y Download Scientific Diagram

The Reduced Inclusive Dis Cross Section Plotted As A Function Of Y 2 Y Download Scientific Diagram

X^2+y^2=25 a function

X^2+y^2=25 a function-So we are given 2 equations mathx^2 y^2 = 25/math mathxy = 12/math And wish to find all possible solutions for this Let us start by using the second equation and solving for y mathy = \frac{12}{x}/math Which gives mathx^2 \frCirclefunctioncalculator x^2y^2=1 en Related Symbolab blog posts Practice, practice, practice Math can be an intimidating subject Each new topic we learn has symbols and problems we have never seen The unknowing

Solution Graph This Rational Function Finding The Asymptotes Zeros Y Intercept And Other Points As Needed F X 2x 2 8 X 2 25

Solution Graph This Rational Function Finding The Asymptotes Zeros Y Intercept And Other Points As Needed F X 2x 2 8 X 2 25

A lamina occupies the part of the disk x 2 y 2 ?25 in the first quadrant and the density at each point is given by the function ?(x,y)=2(x 2 y 2 ) Question A lamina occupies the part of the disk x 2 y 2 ?25 in the first quadrant and the density at each point is given by the function ?(x,y)=2(x 2Get stepbystep solutions from expert tutors as fast as 1530 minutes Your first 5 questions are on us!You can put this solution on YOUR website!

Subtract x2 x 2 from both sides of the equation y2 = 25−x2 y 2 = 25 x 2 Take the square root of both sides of the equation to eliminate the exponent on the left side y = ±√25− x2 y = ± 25 x 2 The complete solution is the result of both the positive and negative portions of the solutionSee the answer See the answer See the answer done loading Show transcribed image text Expert AnswerClearly, A is the set of all points on the circle x 2 y 2 = 2 5 and B is the set of all points on the ellipse x 2 9 y 2 = 1 4 4 These two intersect at four points P, Q, R

 The first polynomial is a factor of the second if the division does not have any remainder This can be checked by substituting x = 5 in the second polynomial and verifying if it is a root 3 (5)**2 5 (5) 50 = 150 It is Not a factorΔ = b 24ac Δ = 0 24·2·(25) Δ = 0 The delta value is higher than zero, so the equation has two solutions We use following formulas to calculate our solutionsLine Equations Functions Arithmetic & Comp Conic Sections Transformation Matrices & Vectors Matrices Vectors Geometry Plane Geometry Solid Geometry Conic Sections x^{2}y^{2}=25, 3xy=15 en Related Symbolab blog posts High School Math Solutions – Systems of Equations Calculator, Nonlinear

X2 T01 10 Locus Complex Nos 1 11

X2 T01 10 Locus Complex Nos 1 11

Implicit Differentiation

Implicit Differentiation

B xy^2=5Y^2=5XY= OR SQRT (5X)WE DO NOT GET UNIQUE VALUE FOR Y SO IT IS NOT A FUNCTION c x^2y^2=25Y^2=25X^2Y= OR SQRT (25X^2)WE DO NOT GET UNIQUE VALUE FOR Y SO IT IS NOT A FUNCTION d noone ofMultiply x 2 y 2 y 2 − 2 x y x 2 times − x y − 2 x by multiplying numerator times numerator and denominator times denominator Cancel out x in both numerator and denominator Cancel out x in both numerator and denominator Factor the expressions that are not already factoredExperts are tested by Chegg as specialists in their subject area We review their content and use your

For X 2 100 Y 2 25 1 Prove That A E 5 2 B Sa S A 25 Where S S Are Foci A Is Vertex Sarthaks Econnect Largest Online Education Community

For X 2 100 Y 2 25 1 Prove That A E 5 2 B Sa S A 25 Where S S Are Foci A Is Vertex Sarthaks Econnect Largest Online Education Community

How To Construct The Graph Of X 2 Y 2 9 Quora

How To Construct The Graph Of X 2 Y 2 9 Quora

( , ) EHttp//wwwfreemathvideoscom In this video series I show how we determine the difference between a relation and a function A function is a relation where eX^ {2}y^ {2}25=0 Subtract 25 from both sides x=\frac {0±\sqrt {0^ {2}4\left (y^ {2}25\right)}} {2} This equation is in standard form ax^ {2}bxc=0 Substitute 1 for a, 0 for b, and 25y^ {2} for c in the quadratic formula, \frac {b±\sqrt {b^ {2}4ac}} {2a} x=\frac {0±\sqrt {4\left (y^ {2}25

Graph Equations System Of Equations With Step By Step Math Problem Solver

Graph Equations System Of Equations With Step By Step Math Problem Solver

Graphs And Level Curves

Graphs And Level Curves

 Explanation We are given the relation x = y2 We are asked to decide if it defines a function If no matter what the value of the first variable, x,there is precisely one value of the second variable, y,connected to it inside the relationship then it will be a function The rule is that you plug in x and y and must have x 2 y 2 = 25 be true The domain is important For example, if the domain is only x = − 5 and x = 5, then you have a function since it is well defined (passes the vertical line test) If you include all x, this is not a function since it fails the vertical line testSo, the first thing to notice with this problem is that mathx^22xyy^2/math is a perfect square, math(xy)^2/math This is especially nice, since the right side of that first equation is 25, also a perfect square Thus, you can simplify t

Equation Of Tangent Line To Circle X 2 Y 2 100 At Point 6 8 Youtube

Equation Of Tangent Line To Circle X 2 Y 2 100 At Point 6 8 Youtube

The Reduced Inclusive Dis Cross Section Plotted As A Function Of Y 2 Y Download Scientific Diagram

The Reduced Inclusive Dis Cross Section Plotted As A Function Of Y 2 Y Download Scientific Diagram

Solution for X2y2=25 equation X2X2=25 We move all terms to the left X2X2(25)=0 We add all the numbers together, and all the variables 2X^225=0 a = 2;Click here to see ALL problems on test Question Determine whether the equation defines y as a function of x X^2y=49 X^2y^2=25 Answer by stanbon (757) ( Show Source ) You can put this solution on YOUR website!Question The natural domain of the function In(x2 y2 – 25) is Select one O x2 y2 < 25 O x2 y2 > 25 O x > 5 and y > 5 O x y > 5 O x2 y2 > 25 This problem has been solved!

Solve Equations Numerically Matlab Simulink

Solve Equations Numerically Matlab Simulink

Find Marginal Density Function Xx For The Followi Gauthmath

Find Marginal Density Function Xx For The Followi Gauthmath

Answer to Compute the line integral of the vector field F=, over the circle x^{2}y^{2}=25 oriented clockwise By signing up, you'll get for Teachers for Schools for Working ScholarsWrite as a Function of x x^2y^2=25 x2 y2 = 25 x 2 y 2 = 25 Subtract x2 x 2 from both sides of the equation y2 = 25−x2 y 2 = 25 x 2 Take the square root of both sides of the equation to eliminate the exponent on the left side y = ±√25− x2 y = ± 25 x 2X^2y^2=25 Answer by nyc_function(2741) (Show Source) You can put this solution on YOUR website!

Let R X Y X Y In R X 2 Y 2 25 R X Y X Y In R Y 4 9 X 2 Then

Let R X Y X Y In R X 2 Y 2 25 R X Y X Y In R Y 4 9 X 2 Then

Implicit Differentiation

Implicit Differentiation

Free functions intercepts calculator find functions axes intercepts stepbystep This website uses cookies to ensure you get the best experience By 1) Find the second derivative of x^2 y ^ 2 = 25 I can only find the first derivative i can't find the second 2) Find the second derivative of y = x^2 y^3 xy I actually have no clue how to find the second derviative This sort of question is going to be on a test, but my teacher didn't cover it So please explain it step by stepX 2 y 2 = 25 , which represents a circle of radius five centered at the origin Suppose that we wish to find the slope of the line tangent to the graph of this equation at the point (3, 4) How could we find the derivative of y in this instance ?

Circles

Circles

Express X Y X 2 Y 2 25 Where X Y Inw As A Set Of Ordered Pairs

Express X Y X 2 Y 2 25 Where X Y Inw As A Set Of Ordered Pairs

Differentiate implicitly once with respect to mathx/math, applying chain rule math2x 2yy' =0/math mathy'= \frac xy/math Differentiate a second timeLet sqrt = square root Radius = sqrt25 Radius = 5 Center is the origin or simply put (0,0) Copy and paste link below to see your circle graphSOLUTION x^2y=25 define y as a function of x Algebra > Functions > SOLUTION x^2y=25 define y as a function of x Log On Algebra Functions, Domain, NOT graphing Section

X Square Plus Y Square Equal To 25 Is It Function Understand Graphically In Hindi Youtube

X Square Plus Y Square Equal To 25 Is It Function Understand Graphically In Hindi Youtube

Graphs And Level Curves

Graphs And Level Curves

Figure 330 The equation x 2 y 2 = 25 x 2 y 2 = 25 defines many functions implicitly If we want to find the slope of the line tangent to the graph of x 2 y 2 = 25 x 2 y 2 = 25 at the point ( 3 , 4 ) , ( 3 , 4 ) , we could evaluate the derivative of the function y = 25 − x 2 y = 25 − x 2 at x = 3 x = 3D Where is the center of mass?A lamina occupies the part of the disk x2y2≤25 in the first quadrant and the density at each point is given by the function ρ(x,y)=5(x2y2) What is the total mass?

Determine Whether The Relation Defines Y As A Chegg Com

Determine Whether The Relation Defines Y As A Chegg Com

Content The Concept Of A Function

Content The Concept Of A Function

One way is to first write y explicitly as a function of x Thus, x 2 y 2 = 25 , y 2 = 25 xThe second derivative of the function x2 y2 =25 is equal to (25/y3) True or false?Solve for y as a function of x and Since the square root cannot be negative, then The domain of x is {5,5} and the range of y is {5,5}

You Can Do It 2 5 Implicit Differentiation How Would You Find The Derivative In The Equation X 2 2y 3 4y 2 Where It Is Very Difficult To Express Ppt Download

You Can Do It 2 5 Implicit Differentiation How Would You Find The Derivative In The Equation X 2 2y 3 4y 2 Where It Is Very Difficult To Express Ppt Download

Warm Up And Hw Quiz

Warm Up And Hw Quiz

Write as a Function of x x^2y=25 x2 y = 25 x 2 y = 25 Subtract x2 x 2 from both sides of the equation y = 25− x2 y = 25 x 2 To rewrite as a function of x x, write the equation so that y y is by itself on one side of the equal sign and an expression involving only x x is on the other side Suppose 4x^2 9y^2 = 25, where x and y are functions of t (a) If dy/dt = 1/3, find dx/dt when x = 2 and y = 1 (b) if dx/dt = 3, find dy/dt when x = 2 and y = 1 find dy/dt when x = 2 and y = 1 Expert Answer Who are the experts?Solve by Substitution x^2y^2=25 , xy=1 x2 y2 = 25 x 2 y 2 = 25 , x − y = 1 x y = 1 Add y y to both sides of the equation x = 1 y x = 1 y x2 y2 = 25 x 2 y 2 = 25 Replace all occurrences of x x with 1y 1 y in each equation Tap for more steps Replace all occurrences of x x in x 2 y 2 = 25 x 2 y 2 = 25 with 1 y 1

Graphing Quadratic Functions Mathbitsnotebook A1 Ccss Math

Graphing Quadratic Functions Mathbitsnotebook A1 Ccss Math

Graphs Of Ellipses College Algebra

Graphs Of Ellipses College Algebra

B What is the moment about the xaxis?Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers Visit Stack ExchangeExperts are tested by Chegg as specialists in their subject area We review their content and use your feedback to keep the

Answered Find The Exponential Function F X Ax Bartleby

Answered Find The Exponential Function F X Ax Bartleby

Implicit Differentiation

Implicit Differentiation

 Figure \(\PageIndex{1}\)The equation \(x^2y^2=25\) defines many functions implicitly If we want to find the slope of the line tangent to the graph of \(x^2y^2=25\) at the point \((3,4)\), we could evaluate the derivative of the function \(y=−\sqrt{25−x^2}\) at \(x=3\) If A = {(x, y)/x2 y2 = 25} and B{(x, y)/x2 9y2 = 144} then A ∩ B contains (a) two points (b) one points (c) three points (d) four pointsHyperbolafunctioncentercalculator centro \frac{y^2}{25}\frac{x^2}{9}=1 en Related Symbolab blog posts My Notebook, the Symbolab way Math notebooks have been around for hundreds of years You write down problems, solutions and notes to go back

Equation Of Tangent Line On Circle X 1 2 Y 2 2 25 Youtube

Equation Of Tangent Line On Circle X 1 2 Y 2 2 25 Youtube

Solution Hi Can I Have Some Help With Finding This Function Find A Function Whose Graph Is The Bottom Half Of The Circle X 2 Y 2 25 F X

Solution Hi Can I Have Some Help With Finding This Function Find A Function Whose Graph Is The Bottom Half Of The Circle X 2 Y 2 25 F X

Determine whether the equation defines y as a function of x X^2y=49 y = x^249Graph x^2y^2=25 x2 y2 = 25 x 2 y 2 = 25 This is the form of a circle Use this form to determine the center and radius of the circle (x−h)2 (y−k)2 = r2 ( x h) 2 ( y k) 2 = r 2 Match the values in this circle to those of the standard form The variable r r represents the radius of the circle, h h represents the xoffset from the origin, and k k represents the yoffset from originC What is the moment about the yaxis?

Implicit Differentiation

Implicit Differentiation

Video Example Example 1 A If X2 Y2 25 Find Y Chegg Com

Video Example Example 1 A If X2 Y2 25 Find Y Chegg Com

Find the domain of the function g(x, y)=\sqrt{x^{2}y^{2}25} Boost your resume with certification as an expert in up to 15 unique STEM subjects this summerIn the equation x2 y2 = 25, the quantities x2 and 25, like y, are also functions of x (everywhere, in particular near x = 3) (25 is a constant function) Since x2 y2 and 25 are equal, their derivatives with respect to x are equal too, ie, (d/dx) (x2 y2) = (d/dx) (25) = 0 A function can be seen as a recipe, saying if x is such, then y is so In this case the relation can be rewritten as y^2=25x^2>y=sqrt(25x^2)ory=sqrt(25x^2) These values are only defined in the domain 5

Identify The Type Of Graph That Each Equation Has Chegg Com

Identify The Type Of Graph That Each Equation Has Chegg Com

Nelder Mead Fmin Xyz

Nelder Mead Fmin Xyz

AND if x = 3, y will be 9 so you can see that every element of the domain will be mapped onto only one value of the range In other words, 3 is mapped onto 9 and ONLY 9and 3 is mapped onto 9 and ONLY 9 In # 2, if x = 16, y could be 4 or 4 so we'd have a value of x that is mapped onto MORE tha Continue Reading 1Expert Answer Who are the experts?

However Some Functions Are Defined Implicitly Some Examples Of Implicit Functions Are X 2 Y 2 25 X 3 Y 3 6xy Ppt Download

However Some Functions Are Defined Implicitly Some Examples Of Implicit Functions Are X 2 Y 2 25 X 3 Y 3 6xy Ppt Download

Content The Concept Of A Function

Content The Concept Of A Function

Derivative Of X 2 Y 2 Novocom Top

Derivative Of X 2 Y 2 Novocom Top

Implicit Differentiation

Implicit Differentiation

Ellipses

Ellipses

Find And Sketch The Domain Of The Functions A F X Y Sqrt Y Sqrt 25 X2 Y2 B F X Y Sqrt Y X2 1 X2 Sketch The Graph Of The Functions A

Find And Sketch The Domain Of The Functions A F X Y Sqrt Y Sqrt 25 X2 Y2 B F X Y Sqrt Y X2 1 X2 Sketch The Graph Of The Functions A

2

2

Derivative Of X 2 Y 2 Novocom Top

Derivative Of X 2 Y 2 Novocom Top

Graph Equations System Of Equations With Step By Step Math Problem Solver

Graph Equations System Of Equations With Step By Step Math Problem Solver

Www Lcps Org Cms Lib Va Centricity Domain 2 5 notes filled out Pdf

Www Lcps Org Cms Lib Va Centricity Domain 2 5 notes filled out Pdf

2 6 Implicit Differentiation Copyright Cengage Learning All

2 6 Implicit Differentiation Copyright Cengage Learning All

Graph Of Xy 2 Novocom Top

Graph Of Xy 2 Novocom Top

2 Ways To Graph A Circle Dummies

2 Ways To Graph A Circle Dummies

Solve Equations Numerically Matlab Simulink

Solve Equations Numerically Matlab Simulink

How Do You Find An Equation For The Line Tangent To The Circle X 2 Y 2 25 At The Point 3 4 Socratic

How Do You Find An Equation For The Line Tangent To The Circle X 2 Y 2 25 At The Point 3 4 Socratic

Systems Of Linear Equations

Systems Of Linear Equations

1

1

Implicit Differentiation

Implicit Differentiation

Find Range Of Square Root Functions

Find Range Of Square Root Functions

If X 2 Y 2 25 Then Find Dy Dx

If X 2 Y 2 25 Then Find Dy Dx

Unit 2 Lesson 9 Implicit Differentiation 1 2 So Far We Have Been Differentiating Expressions Of The Form Y F X Where Y Is Written Explicitly In Ppt Download

Unit 2 Lesson 9 Implicit Differentiation 1 2 So Far We Have Been Differentiating Expressions Of The Form Y F X Where Y Is Written Explicitly In Ppt Download

Link Springer Com Content Pdf m 3a978 1 349 3 2f1 Pdf

Link Springer Com Content Pdf m 3a978 1 349 3 2f1 Pdf

If X X 1 X 2 Represents

If X X 1 X 2 Represents

1

1

Solution X2 Y2 25 Is Solving This Problem Considered A Function How Do I Plot A Graph Using A Smooth Curve For This Problem Ed

Solution X2 Y2 25 Is Solving This Problem Considered A Function How Do I Plot A Graph Using A Smooth Curve For This Problem Ed

Systems Of Linear And Quadratic Equations

Systems Of Linear And Quadratic Equations

Worked Example Evaluating Derivative With Implicit Differentiation Video Khan Academy

Worked Example Evaluating Derivative With Implicit Differentiation Video Khan Academy

3 8 Implicit Differentiation Calculus Volume 1

3 8 Implicit Differentiation Calculus Volume 1

Consider The Function F X Y 2 25 X2 Y2 A Chegg Com

Consider The Function F X Y 2 25 X2 Y2 A Chegg Com

Why Doesn T Math X Y 2 Math Equal Math X 2 Y 2 Math Quora

Why Doesn T Math X Y 2 Math Equal Math X 2 Y 2 Math Quora

How Can X 2 6x 25 0 Be Written As X 3 2 16 0 Quora

How Can X 2 6x 25 0 Be Written As X 3 2 16 0 Quora

Is X 2 Y 2 25 A Function Mathematics Stack Exchange

Is X 2 Y 2 25 A Function Mathematics Stack Exchange

14 1 Functions Of Several Variables Mathematics Libretexts

14 1 Functions Of Several Variables Mathematics Libretexts

1

1

How Do You Find An Equation For The Line Tangent To The Circle X2 Y2 25 At The Point 3 4 Brainly In

How Do You Find An Equation For The Line Tangent To The Circle X2 Y2 25 At The Point 3 4 Brainly In

Features Graph

Features Graph

Surfaces Part 2

Surfaces Part 2

How To Draw Y 2 X 2

How To Draw Y 2 X 2

14 1 Functions Of Several Variables Mathematics Libretexts

14 1 Functions Of Several Variables Mathematics Libretexts

Circle Equations

Circle Equations

Circles

Circles

Properties Of Functions Y F X Read Y As A Function Of X X Values Independent Variables Y Valuesdependent Variables Domain Of Fall Possible Inputs X Ppt Download

Properties Of Functions Y F X Read Y As A Function Of X X Values Independent Variables Y Valuesdependent Variables Domain Of Fall Possible Inputs X Ppt Download

Example 1 A If X2 Y2 25 Find Dy Dx B Find An Chegg Com

Example 1 A If X2 Y2 25 Find Dy Dx B Find An Chegg Com

Why Is X 2 Y 2 4 Not A Function Quora

Why Is X 2 Y 2 4 Not A Function Quora

However Some Functions Are Defined Implicitly Some Examples Of Implicit Functions Are X 2 Y 2 25 X 3 Y 3 6xy Ppt Download

However Some Functions Are Defined Implicitly Some Examples Of Implicit Functions Are X 2 Y 2 25 X 3 Y 3 6xy Ppt Download

How Do You Find Equation Of Tangent To Circle X 2 Y 2 25 At The Point 3 4 Socratic

How Do You Find Equation Of Tangent To Circle X 2 Y 2 25 At The Point 3 4 Socratic

Graph Plotting In Python Set 1 Geeksforgeeks

Graph Plotting In Python Set 1 Geeksforgeeks

Document

Document

2 Ways To Graph A Circle Dummies

2 Ways To Graph A Circle Dummies

How To Do Implicit Differentiation 2x 2y Y 3 5 Youtube

How To Do Implicit Differentiation 2x 2y Y 3 5 Youtube

40 Evaluate The Following Function When X 1 5 Gauthmath

40 Evaluate The Following Function When X 1 5 Gauthmath

1

1

Answered Find The Exponential Function F X A Bartleby

Answered Find The Exponential Function F X A Bartleby

Partial Fractions Calculator Wolfram Alpha

Partial Fractions Calculator Wolfram Alpha

Solution Graph This Rational Function Finding The Asymptotes Zeros Y Intercept And Other Points As Needed F X 2x 2 8 X 2 25

Solution Graph This Rational Function Finding The Asymptotes Zeros Y Intercept And Other Points As Needed F X 2x 2 8 X 2 25

Nelder Mead Fmin Xyz

Nelder Mead Fmin Xyz

Hyperbolas

Hyperbolas

2

2

Solved As Seen In Example 3 The Equation X 2 Y

Solved As Seen In Example 3 The Equation X 2 Y

Solve System X 2 Y 2 25 Y X 2 5 Youtube

Solve System X 2 Y 2 25 Y X 2 5 Youtube

Chapter 8 Quadratic Functions And Equations Quadratic Function

Chapter 8 Quadratic Functions And Equations Quadratic Function

X 2 Y 2 25 Novocom Top

X 2 Y 2 25 Novocom Top

Slice Matlab Functions

Slice Matlab Functions

Graph X 2 Y 2 4 Youtube

Graph X 2 Y 2 4 Youtube

Using Integration Find Area Of Region X Y X 2 Y 2 1 X Y

Using Integration Find Area Of Region X Y X 2 Y 2 1 X Y

Content The Concept Of A Function

Content The Concept Of A Function

Circles Geogebra

Circles Geogebra

Sketch The Graph Of Y X 3 2 25 Then Select The Graph That Corresponds To Your Brainly Com

Sketch The Graph Of Y X 3 2 25 Then Select The Graph That Corresponds To Your Brainly Com

Aim What Is Implicit Differentiation And How Does It Work Ppt Video Online Download

Aim What Is Implicit Differentiation And How Does It Work Ppt Video Online Download

Solve The Circle And Symmetry Step By Step Math Problem Solver

Solve The Circle And Symmetry Step By Step Math Problem Solver

3 8 Implicit Differentiation Mathematics Libretexts

3 8 Implicit Differentiation Mathematics Libretexts

Ellipses And Hyperbolae

Ellipses And Hyperbolae

Www Lcps Org Cms Lib Va Centricity Domain 2 5 notes filled out Pdf

Www Lcps Org Cms Lib Va Centricity Domain 2 5 notes filled out Pdf

2 Differentiation 2 1 2 2 2 3

2 Differentiation 2 1 2 2 2 3

Incoming Term: x^2+y^2=25 a function, does x^2+y^2=25 define y as a function of x, does the equation x^2+y^2=25 define y as a function of x,

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