diketahui f(x) = 2x^2 +3x-5 dan g(x)= 4x-3. tentukan hasil: (g o f)(2) dan (f o g)(2)

jawab

fungsi

f(x) = 2x²+ 3x - 5
g(x)= 4x- 3

gof(2) = g { f(2)} = g (2.2² + 3.2 - 5)
gof(2) = g (8+6-5) = g(9)
gof(2) = 4(9) - 3
gof(2) = 33

fog(2) = f { g(2)} = f {4.2 - 3} 
fog(2) = f(8-3) = f(5)
fog(2) = 2.5² + 3.5  - 5
fog(2) = 60