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Friday, September 10, 2010
If a and b are integers and a is not equal to b, is ab > 0?
If a and b are integers and a is not equal to b, is ab > 0?
(1) a^b > 0
(2) a^b is a non-zero integer
Is
? Question basically asks are
and
both positive or both negative.
(1)
--> both
and
could be positive as well as
could be positive and
negative. Not sufficient.
(2) a^b is a non-zero integer --> if
and
answer would be NO but if
and
answer would be YES. Not sufficient.
(1)+(2) Example from (2) is still valid. Not sufficient.
Answer: E.
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