Question

Function help please

Answer 1

Let f(x) = 9x − 2 and g(x) = −x + 3. Find f(g(x)).

Answer 2

F(g(x)) means that you have to plug in the equation g(x) into f(x). its like f(4)= 9(4)-2. However, instead of just a number, you're plugging in an entire equation. Therefore, it would be f(g(x))= 9 (-x+3) -2

Answer 3

After that, you would just simplify, and then get your answer :)

Answer 4

continue please
I'm kinda confused at this lesson

Answer 5

oh

Answer 6

do you understand or still need help?

Answer 7

let me try to simplift then

Answer 8

would the answer be -9x+25?

Answer 9

yep you got it

Answer 10

hold on I have one more question
Let f(x) = 7x − 13. Find f−1(x).
what does it mean to find f^-1x?

Answer 11

f^-1x is saying find the inverse of the equation

Answer 12

Is there anything else I need to know?
The notes just confused me more

Answer 13

well you have to find the inverse of the equation if its asking you to find f^-1x. do you know how to do that?

Answer 14

yup I already got my answer
x+13/7

Answer 15

alright then you're good to go

Answer 16

there's also another kind of question on my quiz
Let f(x) = 2x + 2. Solve f−1(x) when x = 4.
Do I just find the inverse and substitute x with 4?

Answer 17

im not 100% sure about that one, but that's most likely what you do

Answer 18

alright thanks