Tangent Line Approximation | AP Calculus AB

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1998 FRQ #4

Ace your AP Calculus exam with this in-depth walkthrough of AP Calculus AB 1998 FRQ #4 📚✏️:

4. Let f be a function with f (1) = 4 such that for all points (x, y) on the graph of f the slope is given by (3x^2 + 1)/(2y) .
(a) Find the slope of the graph of f at the point where x = 1.
(b) Write an equation for the line tangent to the graph of f at x = 1 and use it to approximate f (1.2).

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