Question

12) Seja f a função definida por f(x) = 2x+6, determine:

a) f(2) = 2.2+6
b)f(-2) = 2(-2)+6
c) f(2) + f(0)
d) f(4).f(3).f(1) =
e) f(4): f(-2)=
f) f(3) + f(4) + f(3+4) =

Answer 1

c) f(2) + f(0) = 2(2) + 6 + 2(0) + 6 = 10+6 = 16
d) f(4).f(3).f(1) = (2(4) +6)(2(3) + 6)(2(1) + 6) = (14)(12)(8) = 1344
e) f(4):f(-2) = (2(4) + 6) : (2(-2)+ 6) = 14:2 = 7
f) f(3) + f(4) + f(7) = (2(3) + 6) + (2(4) + 6) + (2(7) + 6) = 12 + 14 + 20 = 46