---

Status: Waiting for your responses.

Given: f(x) = -3x2 + 4x - 7 Problem: Determine the derivative of f(x) using the definition of a derivative. f ' (x) = lim f(x+h) - f(x) h h→0 f ' (x) = lim -3(x+h)2+(x+h)-7 - (-3x2+4x-7) h h→0 f ' (x) = lim -3(x2+xh+h2)+4(x+h)-7 - (-3x2+4x-7) h h→0 f ' (x) = lim -3x2+xh-3h2+4x+4h-7 + x2-4x+7 h h→0 f ' (x) = lim xh+h2+h h h→0 f ' (x) = lim h(x+h+) h h→0 f ' (x) = lim x+h+ h→0 f ' (x) =   x+