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Question
I sure could use your help!!

Find the domain of the rational function:

r(x)=( x^2+7x-8)/(x^2-64)

Thanks for the help!!!

Answer
For any number input, each term can be evaluated.
The only thing to check for is that the denominator of the fraction can't be 0.

That is, x^2 - 64 != 0 where != is 'not equal to'.
That occurs when x^2 = 64.  That means it happens when x = 8 or x = -8.

The domain, then, is all x in either (-infinity,-8), (-8,8), or (8,infinity).

It could also be stated as all x except where x = 8.

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Scott A Wilson

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Any algebraic question you've got. That includes question that are linear, quadratic, exponential, etc.

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I have solved story problems, linear equations, parabolic equations. I have also solved some 3rd order equations and equations with multiple variables.

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Documents at Boeing in assistance on the manufacturiing floor.

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MS at math OSU in mathematics at OSU, 1986. BS at OSU in mathematical sciences (math, statistics, computer science), 1984.

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Both my BS and MS degrees were given with honors.

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