tentukan rumus fungsi f(x) jika diketahui: a.g(x)=x-1 dan (fog) (x)=3x-5 b.g(x)=x+3 dan (fog) (x)=x²+8x+10

semoga membantu. semangat

langsung aja y

A.
misal :
x-1 = a
x = a+1

(fog)(x) = f{g(x)}
3x - 5 = f{x-1}
3(a+1) - 5 = f(a)
3a + 3 - 5 = f(a)
3a - 2 = f(a)

f(x) = 3x - 2

B.
misal :
x+3 = a
x = a-3

(fog)(x) = f{g(x)}
x²+8x+10 = f(x+3)
(a-3)² + 8(a-3) + 10 = f(a)
a² - 6a + 9 + 8a - 24 + 10 = f(a)
a² + 2a - 5 = f(a)

f(x) = x² + 2x - 5

semoga berguna +_+