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Algebra/College Algebra - 2nd year

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Expert: - 10/10/2010


Question
Find all number for which the rational expression is undefined. -9/17x

Answer
At first I wondered if this was really -9/(17x) or -9x/17, but then I realized that x needs to something besides an integer multiple of 1/17 in the first case or a multiple of 17 in the 2nd case.

Note that both ways involve a 17 since 17 is prime.

This is because the fraction is already in lowest terms.
If the numerator and denominator had any common factors,
they would need to be removed for the answer was visible.

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