Di ketahui fog (x) = x +2,g (x)=2x+1 tentukan fungsi f (x)​

fog(x) = x+2

g(x) = 2x+1

fog(x) = x+2

f(g(x)) = x+2

f(2x+1) = x+2

misal

n = 2x+1

2x = n-1

x = (n-1)/2

f(n) = (n-1)/2 + 2

f(n) = (n+3)/2

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