Question

If f(x)=3(x+5)+4/x what is f(a+2) ?

Answer 1

`f(x)=3(x+5)+(4)/(x)\\\\f(a+2)\to\text{put x = a + 2 to the equation of the function f}\\\\f(a+2)=3(a+2+5)+(4)/(a+2)=3(a+7)+(4)/(a+2)`