Question

f(x)=3x+(5/x) what is f(a+2)

Answer 1

Explanation

$f(x)=3x+\frac{5}{x}$$f(a+2)=6+3a+\frac{5}{a+2}$

Step 1

replace (a+2) in the place for x

then,

$\begin{gathered} f(x)=3x+\frac{5}{x} \\ f(a+2)=3(a+2)+\frac{5}{(a+2)} \\ f(a+2)=3a+6+\frac{5}{a+2} \\ f(a+2)=6+3a+\frac{5}{a+2} \\ \end{gathered}$

I hope this helps you.