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Real numbers

by greenwich » Sat May 04, 2013 12:25 pm
For which real numbers x is the expression 2/((x-2)(x+1)) not defined?

(A) x=0 only
(B) x=2 only
(C) x=-1 only
(D) x=-1 or 2
(E)x=-1, 0 or 2

Sorry - wrong forum
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by killerdrummer » Sun May 05, 2013 7:08 am
D as denominator becomes ZERO and anyhting/zero is undefined.
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