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27 Nov 2019, 01:46
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
61% (01:11) correct
39%
(01:02)
wrong
based on 64
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27 Nov 2019, 03:34
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Is \(ab > 0\)? Are a and b of SAME sign?
(1) \(\frac{1}{a}<1\)
a could be any integer except 1 and 0, so a can be positive or negative.
(2) \(b^3c^2>0\)
c^2 will always be positive, so b is positive.
Nothing about a
Combined
b>0, but a could be anything
E
(1) \(\frac{1}{a}<1\)
a could be any integer except 1 and 0, so a can be positive or negative.
(2) \(b^3c^2>0\)
c^2 will always be positive, so b is positive.
Nothing about a
Combined
b>0, but a could be anything
E
04 Dec 2019, 05:12
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chetan2u
Is \(ab > 0\)? Are a and b of SAME sign?
(1) \(\frac{1}{a}<1\)
a could be any integer except 1 and 0, so a can be positive or negative.
(2) \(b^3c^2>0\)
c^2 will always be positive, so b is positive.
Nothing about a
Combined
b>0, but a could be anything
E
Hello chetan2u,(1) \(\frac{1}{a}<1\)
a could be any integer except 1 and 0, so a can be positive or negative.
(2) \(b^3c^2>0\)
c^2 will always be positive, so b is positive.
Nothing about a
Combined
b>0, but a could be anything
E
please help me understand below query :
if 1/a< 1 , then doesnt that mean a>1 ? When we cross multiply?
And if a>1 and b>0, then even if they are fractions, the result of ab should always be gretaer than 0?
Thank you
