Question

Please please help me with this problem

Given the functions f(x)=x2 and g(x)= sqrt x, evaluate the following:

(f+g)(14) =

(f+g)(18) =

(f+g)(−16) =

Answer 1

See below for answers

Explanation:

If
`f(x)=x^(2)` and
`g(x)=√(x)`, then:

`(f+g)(14)=f(14)+g(14)=14^(2) +√(14) =196+√(14)`

`(f+g)(18)=f(18)+g(18)=18^(2) +√(18) =324+3√(2)`
`(f+g)(-16)=f(-16)+g(-16)=(-16)^(2) +√(-16) =256±4i`