Let f(z) 72-10z. We will find f'(z) using the definition f'(x) = =lim AO We break this down into four steps, as follows: STEP 1: Find f(x+h). f(x+h) = STEP 2: Find f(x+h) - f(z). f(x +h)-f(z) - STEP 3: Find f(x + h) - f(x) h f(x+h)-f(x) h -0 STEP 4: Find f'(z) = lim A0 f'(x)=0 f(z+h)-f(z) h f(x+h)-f(x) h