Let y=f(x) be the continuous function that satifies the equation x^4-5x^2y^2+4y^4=0 and whose graph contains the points (2,1) and (-2,-2). Let 'L' be the tangent to the graph of f(x) at x=2.(adsbygoogle = window.adsbygoogle || []).push({});

A) Find an expression for y'

B) Write an equation for the line 'L'

C) Give the coordinates of a point that is on the graph of f(x) but not the line 'L'

I am assuming part A means to take a derivative (which I did) and got

(-4x^3+10xy^3)/(-5x^2 2y+16y^3) I don't know if this is right but now I am stuck...any help in the right direction would be great! Thanks!

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# AP Calculus PLEASE HELP!

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