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8. Use the pair of functions to find the value of each of the following combination of functions.

8. Use the pair of functions to find the value of each of the following combination-example-1
User Pour
by
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1 Answer

7 votes

The given functions are


f(x)=x^2,g(x)=(25)/(-8x-1)

We need to find


(f+g)(9)

That means we will add f and g, then substitute x by 9


(f+g)(x)=x^2+(25)/(-8x-1)

Substitute x by 9


(f+g)(9)=9^2+(25)/(-8(9)-1)

Simplify it and solve


\begin{gathered} (f+g)(9)=81+(25)/(-72-1) \\ \\ (f+g)(9)=81-(25)/(73) \\ \\ (f+g)(9)=80(48)/(73) \end{gathered}

The answer is (f + g)(9) = 80 48/73

User Mihey Egoroff
by
6.6k points
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