Day 51: CBSE Class 12 Maths

1. A.
   3, 1
2. B.
   $-1$, 3
3. C.
   $-1$, 2
4. D.
   0, 2

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1. A.
   $-1$
2. B.
   $1$
3. C.
   $\dfrac{5}{3}$
4. D.
   $7$

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1. A.
   $\left(1 + x^2\right) dy + 2xy\, dx = \cot x\, dx$
2. B.
   $y + \dfrac{d}{dx}(xy) = x\left(\sin x + \log x\right)$
3. C.
   $x\left(1 + y^2\right) dx - y\left(1 + x^2\right) dy = 0$
4. D.
   $y\, dx - \left(x + 3y^2\right) dy = 0$

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