Question

Seja f(x) = 8x + 3, determine:
a) f(-2) + f(6) =
b) 3.f(1) + 4.f(-5)=

Answer 1

a) f(-2)=8*(-2)+3= -13 e f(6)=8*6+3=51
f(-2)+f(6)= -13+51=38

b) f(1)=8*1+3=11 e f(-5)=8*(-5)+3= -37
3*f(1)+4*f(-5)= 3*11+4*(-5)=33+(-20)=13