Question

How to solve these problems
Let f(x)=7x+2 and g(x)=2x^2-x-1.compute

a) f(3)+g(3)
b) 5f(-1)-3g(-2)
c) f(4)/f(2)
d) f(g(3))
e) g(f(3))

Answer 1

Any ideas?

Answer 2

You need ideas to get answers, right?

Answer 3

yes

Answer 4

OpenStudy values the Learning process - not the ‘Give you an answer’ process
Don’t post only answers - guide the asker to a solution.

Answer 5

i just need ideas on how to solve it on my own

Answer 6

That's what I'm here to help you get :)

Answer 7

What does f(x) mean to you?

Answer 8

im not really sure

Answer 9

"f" is used as an abbreviation for the word "function" in math, so f(x) is read "a function of x"

Answer 10

oh ok so for A) f(3) x is 3?

Answer 11

Yes, exactly correct.

Answer 12

Replace "x" with the value "3"

Answer 13

hmm i solve problem a) f(3) +g(3) so its gonna be something like this
7(3)+2 2(3)-(3)-1.

Answer 14

$$f(x)=7x+2$$ and $$g(x)=2x^2-x-1$$

Answer 15

Don't forget the square in g(x)

Answer 16

oh yea forgot so it would be
f(x)= 23
g(x)=14

Answer 17

Correct :)

Answer 18

n lastly do i add both of them for the answer or no

Answer 19

f(3)= 23
g(3)=14

Answer 20

Yes, answer = f(3)+g(3)

Answer 21

so i would be 37

Answer 22

it*

Answer 23

yes

Answer 24

thank you i understand a little i'll try to answer the other questions on my own and thanks again

Answer 25

Thanks for trying to understand :)