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2014-07-06T13:50:38+05:30

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So a = x/y
  b = y/x
so {1/(x/y +1)} +  {1/(y/x +1)}
= y/(x +y) + x/(x +y)
= ( x + y)/( x + y)
= 1
1 5 1
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2014-07-06T14:56:19+05:30