Question

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

Answer 1

F(X) = (3x + 5)/X
F(a + 2) = (3(a + 2) + 5)/(a + 2)
F(a + 2) = (3a + 6 + 5)/(a+2)
F(a + 2) = (3a + 11)/(a + 2).

This would be the final solution.

Answer 2

Answer:

f(a+2) equals:

$\dfrac{3a^2+12a+17}{a+2}$

Step-by-step explanation:

We are given

f(x)=$3x+\dfrac{5}{x}$

We have to find the value of f(a+2)

substituting a+2 in place of x in f(x), we get

$f(a+2)=3(a+2)+\dfrac{5}{a+2} \\\\f(a+2)=\dfrac{3(a+2)^2+5}{a+2} \\\\f(a+2)=\dfrac{3(a^2+4+4a)+5}{a+2} \\\\f(a+2)=\dfrac{3a^2+12+12a+5}{a+2} \\\\f(a+2)=\dfrac{3a^2+12a+17}{a+2}$

Hence, f(a+2) equals:

$\dfrac{3a^2+12a+17}{a+2}$