Question

f as a function of x is equal to the square root of quantity 5 x plus 7, g as a function of x is equal to the square root of quantity 5 x minus 7 Find (f + g)(x).

Answer 1

(f+g)(x) =
`√(5x+7)+√(5x-7)`

Explanation:

f(x) =
`√(5x+7)`

and g(x) =
`√(5x-7)`

We need to find (f+g)(x)

(f+g)(x) = f(x) + g(x)

(f+g)(x) =
`√(5x+7)+√(5x-7)`

It can't be further solved so,

(f+g)(x) =
`√(5x+7)+√(5x-7)`