Question

1. diketahui fog (X) = 2x + 4 dan g(x) = x + 1, tentukan F(x)

Answer 1

Fog(x) = 2x+4
g(x) = x+ 1

fog (x) = 2x+ 4
f { g(x) } = 2x+4
f(x+1) = 2x + 4

x+1 = a
x = a - 1

f(a) = 2(a-1) + 4
f(x) = 2(x-1) + 4
f(x) = 2x-2 + 4 ---> f(x) = 2x + 2