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Source: — Data Sufficiency |
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by Frankenstein » Tue Jul 05, 2011 11:03 pm
Hi,
From(1):
if b=-3, a=2, a^b = 1/8 (positive)
if b=-3, a=-2, a^b = -1/8 (negative)
Not sufficient
From(2):
if b=-3, a=2, a^b = 1/8 (positive)
if b=-3, a=-2, a^b = -1/8 (negative)
Not sufficient
Both(1) and (2):
if b=-3, a=2, a^b = 1/8 (positive)
if b=-3, a=-2, a^b = -1/8 (negative)
Not sufficient

Hence, E
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by amit2k9 » Fri Jul 08, 2011 2:26 am
a b=a=1 and b=-1,a=-2 gives different results. not sufficient.

b b=-1 a= +|- 1 gives different results too. not sufficient.

a+b
b=-1 and a= +|-2 gives different results too.
not sufficient.

hence E it is.
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