Question

Jika f^-1(x-1) = 4-3x/x-2 maka nilai f(-5) adalah.....

Answer 1

2. f^-1(x)=4 - 3(x+1)/(x+1)-2. f^-1(x)= 4x-4-3x-3/x-1. f^-1(x)=x-7/x-1. f(x)=x-7/x-1. f(-5)=-12/-6= 2

Answer 2

F^-1 (x - 1) = (1 - 3(x - 1)) / (x - 1 - 1)
f^-1 (x) = (1 - 3x)/(x - 1)
x = (1 - 3y)/(y - 1)
xy - x = 1 - 3y
xy + 3y = 1 + x
y(x + 3) = 1 + x
y = (1 + x)/(x + 3)
f(-5) = (1 - 5)/(- 5 + 3)
      = - 4/ - 2
      = 2