mohon dijawab semoga amal nya dibalas allah

jawab

f(x)= (2x +1)/(x+5)

f⁻¹ {(2x+1)/(x+5)} = x
f⁻¹ (3)= ...

(2x+1)/(x+5)= 3
3(x+ 5) = 2x +1
3x + 15 = 2x + 1
3x - 2x = 1 - 15
x = - 14

f⁻¹(3)= - 14