Posted by **Fareha** on Saturday, December 3, 2011 at 10:29pm.

1. Let y = f(x) be the continuous function that satisfies 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 line tangent to the graph of f at x = 2.

a. Find an expression for y’

b. Write an equation for line l

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