Question:`(x + y)/(x - y) + (x - y)/(x + y)`= কত? 

A `(2(x^2 + y^2)/(x^2 - y^2)` 
B `(x + y)/(x^2 - y^2)` 
C `1/(x^2 - y^2)` 
D `(x^2 + y^2)/(x^2 - y^2)` 

+ Answer
A 

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Irin Moni

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