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The general solution of dydx=1+x2+y2+x2y2\frac{dy}{dx} = 1 + x^2 + y^2 + x^2y^2 is:

(given that CC is the constant of integration)

Solution

✅ Correct Option: 2

Factor: 1+x2+y2+x2y2=(1+x2)(1+y2)1 + x^2 + y^2 + x^2 y^2 = (1 + x^2)(1 + y^2). Separate: dy/(1+y2)=(1+x2) dxdy/(1 + y^2) = (1 + x^2)\,dx. Integrate: tan⁡−1y=x+x3/3+C\tan^{-1}y = x + x^3/3 + C.

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