1.

The solution of defferential equation (dy)/(dx) + x/y. (x^2 + y^2 - 1)/(2(x^2 + y^2) + 1)= 0is

Answer»

`x^2 + y^2 + 3 LOG (x^2 + y^2) = C `
`x^2 + 3xy - 3 log (x^2 + y^2 + 2) = c `
`x^2 + 2y^2 - 3 log (x^2 + y^2 + 2) = c `
`-x^2 - 2y^2 - 3 log (x^2 + y^2)= c `

ANSWER :C


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