Question

SENDO F(X)=3x+2 , calcule f(x+h)-f(x)/h

Answer 1

$\frac{f(x+h)-f(x)}{h} = \frac{(3*(x+h)+2)-(3x+2)}{h} = \frac{3x+3h+2-3x-2}{h} = \\ \\ = \frac{3h}{h} = 3$