diketahui fungsi (f o g)(x) = 4 - 2x dan g(x) = x+6. tentukan fungsi f(x)

jawab

g(x) = x + 6
fog(x)= 4 - 2x
f { g(x)} = 4 - 2x
f{x + 6} = 4 - 2x

f(x) = 4 - 2( x- 6)
f(x ) = 4 - 2x + 12
f(x) = 16 - 2x