Question

Let f(x)=x+1 and g(x)=5x evaluate the composition (f•g)(-1)

Answer 1

`(f\circ g )(x) = -4`

Explanation:

We have

`(f\circ g )(x) := f(g(x))`

Therefore,

`f(x)=x+1 \implies f(x)=g(x)+1`

So,

`(f\circ g )(x) = 5x + 1`

For
`x = -1:`

`(f\circ g )(x) = 5(-1) + 1 = -5+1=-4`