Diketahui fog(x)=-x dan f(x)=x/x-1, carilah g(x)

jawab

f(x) = x/(x-1)
fog(x) =  - x
f{ g(x)} = -x
g(x)/ { g(x)- 1} = - x
g(x) = -x  { g(x) - 1}
g(x)= - x. g(x)   + x
g(x) + x g(x) = x
g(x) { 1 + x} = x
g(x) = x/ (x+1)