jika f(x-5)=x+2/x maka f^-1 (x) = ....

f(x-5)= x + 2 / x
misal t = x-5
x= t+5
maka
f(x) = (t+5)+2 / (x+5)
f(x) = x + 7 / x+5

cari inversnya

y = x + 7 / x+5
y(x+5) = x+7
xy +5y = x+7
xy-x = -5y+7
x(y-1)=-5y+7
x = -5y+7 / y-1
f-¹(x) = -5x+7 / x-1