Question

Function Notation help!

f(x) = 3x + 2

f(3)
Is this how you do it:

3(3)+2
9+2
11

Answer 1

correct :)

Answer 2

Thank you! is this also right:

g(x) = x^2 -1

g(5)

5^2 - 1
25 - 1
24

Answer 3

I would keep the equal sign throughout


f(x) = 3x + 2
f(3) = 3(3) + 2
f(3) = 9 + 2
f(3) = 11


but other than that, you have the correct steps and final answer.

Answer 4

correct agaun

Answer 5

again*

Answer 6

Yes

Answer 7

also, what does it mean when a question says (example):

(f)x = 3x + 2

x when (f)x = 2

Answer 8

the notation should be f(x) not (f)x

Answer 9

it sounds like they want you to find the value of x when f(x) = 2

so you'll replace all of `f(x)` with 2 and solve for x

Answer 10

\[\Large f(x) = 3x+2\]
\[\Large {\color{red}{f(x)}} = 3x+2\]
\[\Large {\color{red}{2}} = 3x+2 \ ... \ \text{Replace } {\color{red}{f(x)}} \text{ with } {\color{red}{2}}\]

now solve for x

Answer 11

sorry i meant to say: x when f(x) = 2