1) g(x) =7x fog(x)=42x-5 f(x)= 2) f(x)=7x-10 gof(x)=42x-65 g(-1)= 3) g(x)=4x-1 gof(x)=8x-9 f(2)= tolong plis dijawab? buat besok, pake cara ya

1) g(x) = 7x dan fog(x) = 42x -5
f { g(x) } = 42x -5
f (7x) = 42x -5
f (7x) = 6(7x) -5
f (x) = 6x 5
2) f (x) = 7x -10 dan gof(x) = 42x -65
g { f(x) } = 42x -65
g (7x -10) = 42x -65
g (7x -10) = 6(7x -10) -5
g (x) = 6x -5
g (-1)= 6(-1) -5
= -11
3) g(x) = 4x -1 dan gof(x) = 8x -9
g { f(x) } = 8x - 9
4.f(x) -1 = 8x -9
4.f (x) = 8x -9+1
4.f(x) = 8x -8
f (x) = (8x -8)/4
f (x) = 2x -2
f (2) = 2.2 - 2.
= 4-2
= 2