f(x) = x-1/x g(x) = x+3 tentukan g(f(x)) - 1?

jawab

f(x) = (x -1) / x

g(x)= x + 3

g { f(x)} - 1 =

= g { (x - 1)/x }   - 1

= ( (x - 1)/x  + 3 ) - 1

= ( x - 1) /x   + 2

= ( x - 1 + 2x )/ x

= ( 3x -1) / x