jika f(x)= 2x-5/x-9.invers dari f(x) adalah..

f(x) = ax+b /cx+d
f(x) = 2x-5/x-9
a= 2,b=-5, c=1, d=-9
f`(x) = -dx+b/cx-a
f`(x) = 9x-5/x-2

Here's the answer. Thank you