Dik:f(x)=2x+1 fog(x)=4x+5 ditanya g-1(1)

jawab

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

g⁻¹(2x + 2) = x
2x + 2 = 1
2x = -1
x = - 1'/2


g⁻¹(1) = - 1/2