yang bisa tolong jawab pertanyaan ini :)

[1] ((f o g) o h)(x)= (f(g(x) o h)(x)
Cari dlu f(g(x)
f(g(x))=f(3 - x)
=>2(3 - x) + 1
=>7 - 2x

Misal f(g(x)) = a(x)
(a o h)(x) = a(h(x))
=>a(x² + 2)
=>7 - 2(x² + 2)
=>3 - 2x²

[2] (f o (g o h))(x) = (f o g(h(x))
Cari g(h(x))
g(h(x)) = g(x² + 2)
=>3 - (x² + 2)
=>3 - x² - 2
=>1 - x²

Misal g(h(x)) = a(x)
(f o a)(x) = f(a(x))
=>f(1 - x²)
=>2(1 - x²) + 1
=>3 - 2x²

>TERBUKTI<