mohon bantuannya sekali kak

jawab

1.  f(x) = x + 2
g(x) =2/(3x -6)

(f+g)(x) =  f(x) + g(x)
=  x  + 2  + 2/(3x -6)
= {x(3x-6) + 2(3x-6) + 2}/(3x -6)
= { x² -6x + 6x -12 + 2 } /(3x -6)
= (x² -10)/(3x - 6)

2. f(x) = 2x -2
g(x)= x² -1
gof(2) =  g { f(2) }
= g { 2(2) - 2 }
= g(2)
= 2² -1
= 3

3.  fog(x) =  f { g(x)}
= f {x² - 1 }}
= 2(x² -1 ) - 2
= 2x² -2  - 2
= 2x² - 4

4.  g(x)= x² + x  +2
fog(x) = 2x² + 2x + 5
f{g(x)} = 2x² + 2x + 5
f (x² + x + 2) = 2x² + 2x + 5
f (x² + x+ 2) = 2 (x²+x + 2) + 1
f(x) = 2x + 1

5. f(x )= x+ 2
fog(x) = 3x - 5
f{g(x)} = 3x - 5
g(x) + 2 = 3x - 5
g(x) = 3x - 5 - 2
g(x) = 3x - 7