tolong dijawab sekarang!! matematika 3 soal saja terimakasih

Bab Fungsi
Matematika SMA Kelas XI

1a] (fog) (x) = x² - 3x + 4
g (x) + 2 = x² - 3x + 4
g (x) = x² - 3x + 2

b] g (x + 1) = (x + 1)² - 3 (x + 1) + 2
g (x + 1) = x² + 2x + 1 - 3x - 3 + 2
g (x + 1) = x² - x

c] (gof) (x) = (x + 2)² - 3(x + 2) + 2
(gof) (x) = x² + 4x + 4 - 3x - 6 + 2
(gof) (x) = x² + x

2a] (gof) (x) = 5x - 15
y = 5x - 15
5x = y + 15
x = 1/5 (y + 15)
(gof)^-1 (x) = 1/5 (x + 15)

b] (g^-1 o f^-1) (x) = (fog)^-1 (x)
(fog) (x) = 5x - 3
y = 5x - 3
5x = y + 3
x = 1/5 (y + 3)
(fog)^-1 (x) = (g^-1 o f^-1) (x) = 1/5 (x + 3)

***pengirim soal tidak perlu nomor 3***