Question

if f(x)=3(x+5)+4/x what is f(a+2)
a. 3(a+2)+(4/a)+2
b.3(a+7)+4/a+2
c.3(f(a)+5)+4/f(a)+2
Please help ;.;

Answer 1

In your original function f(x) replace all your x's with (a+2).

Answer 2

For example, If i have\[f(x) = 2(x+2)\]
and I am asked what is f(a+2).
Since f is a function of x I will replace all my X values with my new a+2 and get:\[f(a+2) = 2((a+2)+2)\]
Use that same method in your problem and replace all your X values with your new f(a+2)

Answer 3

Okay thank you, so would it be c? because I add the 2 and the 5 right and then i get x+7?

Answer 4

I mean b*****

Answer 5

Correct! Great job

Answer 6

Thank you so much!!!

Answer 7

My pleasure.