1. x2 + 2y2= 1
2. 2x2 +y2= 1
3. x2 + y2= 1
4. x2 + 3y2= 1
2x2 +y2= 1
1. (-1, 2)
2. (1, -2)
3. (1, 2)
4. (2, 1)
(1, -2)
1. 20
2. -7
3. 7
4. -20
-7
1. 1
2. -1
3. 2
4. -2
2
1. {-2, 2}
2. {-3, 3}
3. {-4, 4}
4. {-5, 5}
{-2, 2}
1. 2
2. 4
3. 8
4. 16
8
1. π
2. π/2
3. π/3
4. π/4
π/3
1. x2 + y2 +2x - 4y - 47 = 0
2. x2 + y2 = 49
3. x2 + y2 - 2x + 2y - 47 = 0
4. x2 + y2 = 17
x<sup>2</sup> + y<sup>2</sup> - 2x + 2y - 47 = 0
1. (1, 1/2)
2. (2, 1)
3. (0, 1)
4. (1, 0)
(0, 1)
1. 2 tan-1 (7/4)
2. tan-1 (7/4)
3. 2 cot-1 (7/4)
4. cot-1 (7/4)
2 tan<sup>-1</sup> (7/4)