Question

If f(x) = x+7 and g(x)=1/x what is (f o g)(x)?

Answer 1

For this case we have the following functions:

`f (x) = x + 7\\g (x) = \frac {1} {x}`

We must find
`(f_ {0} g) (x):`

By definition:

`(f_ {0} g) (x) = f (g (x))`

So, evaluating g(x) in f(x) we have:

`(f_ {0} g) (x) = f (g (x)) = \frac {1} {x} +7`

ANswer:

`\frac {1} {x} +7`

Option D