Day 9: NDA Maths

1. A.
   I only
2. B.
   II only
3. C.
   Both I and II
4. D.
   Neither I nor II

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1. A.
   I only
2. B.
   II only
3. C.
   Both I and II
4. D.
   Neither I nor II

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1. A.
   $y\frac{dy}{dx} - x = 0$
2. B.
   $y\frac{dy}{dx} + x = 0$
3. C.
   $x\frac{dy}{dx} - y = 0$
4. D.
   $x\frac{dy}{dx} + y = 0$

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1. A.
   1
2. B.
   2
3. C.
   3
4. D.
   4

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1. A.
   $\sec(y - x) = ce^{\frac{x^2}{2}}$
2. B.
   $\cos(y - x) = ce^{\frac{x^2}{2}}$
3. C.
   $\operatorname{cosec}(y - x) = ce^{\frac{x^2}{2}}$
4. D.
   $\sin(y - x) = ce^{\frac{x^2}{2}}$

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