# Function compostions

Sorry I had to repost, I left somethings out.

For the given functions f and g, find the indicated composition.

5. f(x)=7x+9, g(x)=2x-1
Find (f *g)(x)
I got 14x+2

For the given functions f and g, find the indicated composition.

8. f(x)=-5x+3, g(x)=6x+3
(g * f)(x)
I got -30x+18

Find functions f and g so that h(x)= (f *g)(x)

12. h(x)= 1/(x^2-2)
I got (f)=1/x, g(x)=x^2-2

14. h(x)=(-2x+19)^5
I got f(x)x^5, g(x)=-2x+19

1. If your f*g(x) means f(g(x)), then for problem #5,

f[g(x)] = 7(2x-1) + 9 = 14 x + 2

For problem #12, there may be more than one combination of f and g that result in
f[g(x)] = 1/(x^2-2). The two functions you listed work fine.

posted by drwls

## Similar Questions

1. ### math check

Posted by Nora 56 on Sunday, June 2, 2013 at 7:32pm. Sorry to repost but no one answered after I posted on the 2nd,please help, Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the

3. ### English

Identify the correct sentence. A. Somethings are better left unsaid. B. Some-things are better left un-said. C. Some things are better left un-said. D. Some things are better left unsaid. D

5. ### To Linda >> Microeconomics

Linda, I've deleted your 15 multiple choice questions because you did not tell us what your answers are. If you repost your questions and your answers, someone may be able to check them for you. Jiskha tutors do not do homework or
6. ### English

You are going to take a quiz. I'll distribute exam papers. You should write down the answers. Fill in the blanks with suitable expressions. Take one and pass the others to the other students. First write down your number and name
7. ### English

procedure: Formative Test Now. let's check how well you can use the expressions you've learned. I will distribute handouts. You should pick up a handout on the table. You have to fill in the blanks with suitable expressions. Are