Question

If `f(x) = 2x-1` and `g(x) = 4x`, what is f[g(3)] ?

Answer 1

`23`

Explanation:

By definition of compositions of functions,

`(f@g)(x)=f[g(x)]`

`=f(4x)`

`=8x-1`

`therefore(f@g)(3)=8(3)-1`

`=23`