3. If f(x) = 3x2 + 4x – 2, determine f (xh), f(zh) – f(2) -x = - h 7. If f(x) = 1 determine f(x+b)-f(x) ) 2+1' ь 2 9. if f(x) = = |x-5 +2 determine f(1), f(0), f(x + 5) I 11. if f(x) = x2 – 3x,