`(dy)/(dx)=(1+x^(2))(1+y^(2))`

1.	`(dy)/(dx)=(1+x^(2))(1+y^(2))`
Answer» दिया है, `(dy)/(dx)=(1+x^(2))(1+y^(2))` `implies (dy)/(1+y^(2))=(1+x^(2))dx` `int(dy)/(1+y^(2))=intdx+intx^(2)dx` `implies tan^(-1)y=x+(x^(3))/(3)+C` जोकि अभीष्ट व्यापक हल है।

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