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March 28, 2017

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for the given functions f and g find the following and state the domain of each result

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 - ,

    ok genius, When you type fast sometimes it happens...move along!

  • MATH - ,

    assuming 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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