Question

Dado f(×)=3× cacule el valor f(×+2)-f(×-1) cuando x=2

Answer 1

f(x+2) = 3(x+2) = 3x+6

f(x-1) = 3(x-1) = 3x-3

f(x+2) - f(x-1) = 3x+6-(3x-3) = 3x+6-3x+3 = 9