Question

If f(x) = x + 2, find f(3).

Answer 1

replace all x's by 3 and then evaluate the right hand side

Answer 2

?

Answer 3

replace the x with 3's, as such:\[f(x)=x+2~~~\rightarrow~~~f(3)=3+2\]now just solve:\[f(3)=3+2\]

Answer 4

do you remember substitution?
f(3) is the same as saying x=3 for the equation f(x)

Answer 5

I dont know how to do it still...

Answer 6

what part is confusing to you?

Answer 7

How to get the answer

Answer 8

i dont know how to solve it even tho u did most of it like how would i finish it

Answer 9

f(3) means that you are finding the answer of the function if the value of x was 3....so you substitute 3 for the x and write it as f(3) = 3 + 2 and solve it....you would get f(3) = 5 and that means that when x = 3, the value of the function is 5

Answer 10

does that help @darkbbn ? :)

Answer 11

oh ok i get it u added the 3 and the 2 :D

Answer 12

yes because we substituted 3 for the x :)