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F(x)=x+1 and g(x)=x^3 -1Find (fg)(5)

F(x)=x+1 and g(x)=x^3 -1Find (fg)(5)
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F(x)=x+1 and g(x)=x^3 -1Find (fg)(5)

User Mark Pattison
by
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1 Answer

3 votes

Solution


(fg)(x)=f(x)* g(x)

So


\begin{gathered} f(5)=5+1=6 \\ g(5)=5^3-1=125-1=124 \end{gathered}

and


\begin{gathered} (fg)(5)=f(5)* g(5) \\ (fg)(5)=6*124=744 \end{gathered}

Answer: (fg)(5) = 744

User Jennette
by
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