If f (x) = x 3 + 7x 2 + 8x – 9, find f ‘ (4).

Question

Philoid · Accepted Answer

We are given with a polynomial function f(x) = x³ + 7x² + 8x - 9, and we have to find whether it is derivable at x = 4 or not, so by using the formula, f ‘(c) = , we get,

f ‘(4) =

f ‘(4) = lim_x_→₄ x² + 11x + 52

f ‘(4) = 112.

If f (x) = x3 + 7x2 + 8x – 9, find f ‘ (4).

If f (x) = x³ + 7x² + 8x – 9, find f ‘ (4).