Saturday

April 19, 2014

April 19, 2014

Posted by **Soly** on Saturday, September 15, 2007 at 12:08am.

Can you please check my answers?

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

- Function compostions -
**drwls**, Saturday, September 15, 2007 at 10:18amIf 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.

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