Day 306: NDA Maths

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

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1. A.
   x-y-2xy=c
2. B.
   y-x-2xy=c
3. C.
   y+x-2xy=c
4. D.
   x+y+2xy=c

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1. A.
   $x\sqrt{x^2-16}$
2. B.
   $x-\sqrt{x^2-16}$
3. C.
   $\sqrt{x^2-16}$
4. D.
   $4\sqrt{x^2-16}$

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1. A.
   Four
2. B.
   Two
3. C.
   One
4. D.
   None

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1. A.
   $\dfrac{\tan^{-1}(2x-1)}{2} + c$
2. B.
   $2\tan^{-1}(2x-1) + c$
3. C.
   $\dfrac{\tan^{-1}(2x+1)}{2} + c$
4. D.
   $\tan^{-1}(2x-1) + c$

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