1. A
   $\sqrt{7}$
2. B
   3
3. C
   7
4. D
   9

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1. A
   0.5
2. B
   0.75
3. C
   1.0
4. D
   1.25

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1. A
   7/2
2. B
   5
3. C
   7
4. D
   Cannot be determined due to insufficient data

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1. A
   -15
2. B
   7
3. C
   10
4. D
   15

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1. A
   $\dfrac{\pi}{6}$
2. B
   $\dfrac{\pi}{4}$
3. C
   $\dfrac{\pi}{2}$
4. D
   $\dfrac{2\pi}{3}$

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1. A
   $\dfrac{\pi}{6}$
2. B
   $\dfrac{\pi}{4}$
3. C
   $\dfrac{\pi}{2}$
4. D
   $\dfrac{2\pi}{3}$

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

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

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

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1. A
   $\dfrac{y}{1-xy}$
2. B
   $\dfrac{y}{1+xy}$
3. C
   $\dfrac{y^2}{1-xy}$
4. D
   $\dfrac{y^2}{1+xy}$

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1. A
   $-\dfrac{y_0}{1+e^{y_0}}$
2. B
   $-\dfrac{y_0e^{y_0}}{1+e^{y_0}}$
3. C
   $\dfrac{y_0e^{y_0}}{1+e^{y_0}}$
4. D
   $\dfrac{y_0e^{y_0}}{1-e^{y_0}}$

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1. A
   $\dfrac{\pi}{4}$
2. B
   $\dfrac{\pi}{2}$
3. C
   $\pi$
4. D
   $2\pi$

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1. A
   k
2. B
   2k
3. C
   $k(a+b)$
4. D
   $\dfrac{k}{a+b}$

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1. A
   $\{x\leq2\}\cup\{x\geq3\}$
2. B
   $\{x<2\}\cup\{x>3\}$
3. C
   $(2,3)$
4. D
   $[2,3]$

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