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raju232007
- Master | Next Rank: 500 Posts
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- Joined: Sat Dec 29, 2007 2:43 am
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please post the question correctly and thoroughly search the forum before starting a new thread... this question has been answered earlier...raju232007 wrote:If x*y=1, find ((x+y)^2)/((x-y)^2)
options were
A.2
B.4
C.8
D.16
E.24
if i remember it shud be 16. and i reads like
2^(x+y)^2/2^(x-y)^2
2 ^(x2+y^2+2xy)- (x2+y^2-2xy)
thus ur left with
2^4xy
as xy = 1
its 2^4= 16...
hope that helps...
