Question

Can someone help me with this calculus problem? I think the answer to part c is y - 6 = 3(x - 4).

Answer 1

d/dx 3 (f(x))^2 = 3 * 2f(x) * f'(x) (using chain rule)

now we plug in x = 4

slope of tangent line = 6 * f(4) * f'(4) = 6 * 6 * 3 = 108

Answer 2

he is right