jika f(x)=x-1 dan g(x)=x^2-7 maka (g o f) (3) adalah

Dik f(x) = x-1
G(x) = x^2 -7
Dit (g o f) (3) =?

(g o f) (3) = g(f(3))
= f(3)^2 -7
= (3-1)^2 -7
= (2)^2 - 7
= 4-7
= -3

gof(3) = g(f(3))
          = g(3-1)
          = g(2)
          = 2²-7
          = 4-7
          = -3