tolong dijawab yaa terima kasih

8. f(x) = 2x-1/3x+5
f-1(x) = -5x-1/3x-2
f-1(1/2) =-5(1/2) -1/ 3(1/2) -2
             = -5/2-1/3/2-2
             = -7/2/-1/2
            = 7
inshaallah :)