1. x2-x-6=0
2. x2+x-6=0
3. x2-x-12=0
4. x2+x-12=0
x2+x-6=0
1. π/4 ≤ θ ≤π/2
2. - π/4 ≤ θ ≤0
3. 0≤ θ ≤ π/4
4. π/2 ≤ θ ≤3π/4
0≤ θ ≤ π/4
1. x
2. x2
3. 1/x
4. 1/ x2
x2
1. [-1,1]
2. [-1/2,1/2]
3. [0,1/2]
4. [1,1/2)
[0,1/2]
1. X + y + 1 = 0, x + 2y + 4 = 0
2. X – y + 1 = 0,x – 2y + 4 = 0
3. X + y – 1 = 0,x – 2y + 4 = 0
4. X – y - 1 = 0,2x – y - 4 = 0
X – y - 1 = 0,2x – y - 4 = 0
1. [-2,-1]
2. [1,2]
3. [-2,-1]U[1,2]
4. none
[-2,-1]U[1,2]
1. [0,π)
2. [0, π/2]
3. [-2,-1] U[1,2]
4. none
[0,π)
1. A2
2. -3a2
3. 5a2
4. -5a2
-3a2
1. (2t1t2,2[t1-t2])
2. (3t1,3[t1-t2])
3. (3t1t2,3[t1 + t2])
4. (2t1t2,2[t1 + t2])
(3t1t2,3[t1 + t2])
1. [-π/3,π/3]
2. [-π/2,π/2]
3. [-π/3,π/4]
4. none
[-π/2,π/2]