jika f(x) =2x² + 5x dan g(x) =1/2,maka tentukan (fog) (2)

jawab

f(x ) =  2x²+ 5x
g(x) = 1/2

fog(2) = f { g(2) }
= f (1/2)
= 2(1/2)² + 5(1/2)
= 2 (1/4) + 5/2
= 1/2 + 5/2
= 6/2
= 3