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$\frac xy$ এর সাথে কত যোগ করলে যোগফল $\frac yx$ হবে?

Options :

  • (A) $\frac{x^2-y^2}{xy}$
  • (B) $\frac{2x^2-y^2}{xy}$
  • (C) $\frac{y^2-x^2}{xy}$
  • (D) $\frac{x^2-2y^2}{xy}$

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মনে করি, $a$ যোগ করলে যোগফল $\frac yx$ হবে।

শর্তমতে, $\frac xy + a = \frac yx$

বা, ‍$a=\frac yx - \frac xy = \frac {y^2-x^2}{xy}$

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