Question

Can somebody explain how to find the answer? I'm confused.

Answer 1

Answer:
`f(4a)=(4a+6)/(16a^2+1)`

Explanation:

f(4a) means everything you see x, plug that in with 4a. Doing that exactly so, we can see that below.

`f(x)=(x+6)/(x^2+1)` [plug in x=4a]

`f(4a)=(4a+6)/((4a)^2+1)` [exponent]

`f(4a)=(4a+6)/(16a^2+1)`

Since this cannot be simplified,
`f(4a)=(4a+6)/(16a^2+1)` is our answer.