Question

$\frac{x}{y} + \frac{y}{x} = 2 \: what \: is \: the \: value \: of \: x - y$
this is the question​

Answer 1

Given, y=1+x2x+c

 ⇒y+x2y=x+c

 On differntiation we have

⇒dxdy+x2(dxdy)+(2x)y=1

⇒dxdy=0

⇒0+0+2xy=1

⇒xy=21