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1. A
   $x+1=0$
2. B
   $x-2=0$
3. C
   $x-1=0$
4. D
   $x+2=0$

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1. A
   lying on the same circle
2. B
   vertices of a square
3. C
   vertices of a parallelogram that is not a square
4. D
   collinear

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1. A
   $\left(2,\frac{7}{2}\right)$
2. B
   $\left(2,-\frac{7}{2}\right)$
3. C
   $(4,-7)$
4. D
   $(4,7)$

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1. A
   $\left(\frac{3}{4},\frac{1}{4}\right)$
2. B
   $\left(\frac{3}{2},\frac{1}{2}\right)$
3. C
   $\left(\frac{3}{4},-\frac{1}{4}\right)$
4. D
   $\left(\frac{3}{2},-\frac{1}{2}\right)$

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1. A
   Only one
2. B
   Only two
3. C
   All three
4. D
   None

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1. A
   Only one
2. B
   Only two
3. C
   All three
4. D
   None

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1. A
   Only one
2. B
   Only two
3. C
   All three
4. D
   None

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

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

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1. A
   8
2. B
   $4\sqrt{6}$
3. C
   $8\sqrt{6}$
4. D
   16

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1. A
   $\frac{1}{\sqrt{17}}$
2. B
   $\frac{2}{\sqrt{17}}$
3. C
   $\frac{3}{\sqrt{17}}$
4. D
   $\frac{2}{\sqrt{14}}$

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1. A
   3
2. B
   4
3. C
   5
4. D
   6

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1. A
   $0\leq\theta\leq\pi$
2. B
   $\frac{\pi}{2}\leq\theta\leq\pi$
3. C
   $0\leq\theta\leq\frac{\pi}{2}$
4. D
   $0<\theta<\frac{\pi}{2}$

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1. A
   $\beta=20$
2. B
   $\beta=40$
3. C
   $\beta=-40$
4. D
   $\beta=26$

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

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