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December 26, 2014

December 26, 2014

Posted by **Anonymos** on Tuesday, September 4, 2012 at 11:33pm.

f(x)=3x+1/8x-9; g(x)=5x/8x-9

A) (f+g)(x)=?

B)domain of (f+g)

c) (f/g)(x)=?

d) domain of f/g?

please show work

- MATH -
**Anonymos**, Tuesday, September 4, 2012 at 11:50pmok genius, When you type fast sometimes it happens...move along!

- MATH -
**Steve**, Wednesday, September 5, 2012 at 11:29amassuming you mean

f(x) = (3x+1)/(8x-9)

g(x) = 5x/(8x-9)

(f+g)(x) = [(3x+1)+5x]/(8x-9) = (8x+1)/(8x-9)

(f/g)(x) = (3x+1)/(8x-9) * (8x-9)/5x = (3x+1)/5x

domain is all reals except where the denominator is zero.

visit wolframalpha.com and type

plot <function>

to see a graph of <function>

That should help you get a handle on the range

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