Kak tolong bntuin pr mtk

1) g(f(x)) = 3x + 1
2 f(x) = 3x + 1
f(x) = (3x + 1) / 2

2) g(f(x)) = x^2 - 2x + 3
f(x) - 3 = x^2 - 2x + 3
f(x) = x^2 - 2x + 3 + 3
f(x) = x^2 - 2x + 6

3) f(g(x)) = 3x - 5
f (x - 1) = 3x - 5
misalkan x-1 = y
x= y+1
f(y) = 3(y+1) - 5
= 3y + 3 - 5
= 3y - 2
f(x) = 3x - 2

4) f(g(x)) = 5x - 2
f(x+1) = 5x - 2
misalkan x+1 = y
x = y-1
f(y) = 5(y-1) - 2
= 5y - 5 - 2
= 5y - 7
f(x) = 5x - 7