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vipulgoyal
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Both statements are satisfied if x=1 and y=1:vipulgoyal wrote:If x and y are integers, xy=?
(1) x^(-4x)=1
(2) y^(5y)=1
Statement 1: x^(-4x) = 1^(-4*1) = 1¯� = 1/1� = 1.
Statement 2: y^(5y) = 1^(5*1) = 1� = 1.
In this case, xy = 1*1 = 1.
Both statements are satisfied if x=-1 and y=1:
Statement 1: x^(-4x) = (-1)^(-4*-1) = (-1)� = 1.
Statement 2: y^(5y) = 1^(5*1) = 1� = 1.
In this case, xy = -1*1 = -1.
Since xy can be different values, the two statements combined are INSUFFICIENT.
The correct answer is E.
