1. 0
2. 1
3. -1
4. 3
1
1. 0
2. π / 6
3. π / 4
4. π / 3
π / 3
1. (2, 1, -1)
2. (1, 0, 1)
3. (0, 0, -1)
4. (1, 0, 0)
(2, 1, -1)
1. 2
2. 3
3. -√2
4. √3
-√2
1. YOZ plane
2. ZQX plane
3. XOY plane
4. none of these
YOZ plane
1. 29x + 31y + 3z = 63
2. 23x + 29y - 29z = 23
3. 23x + 29y + 3z = 55
4. 31x + 37y + 3z = 71
23x + 29y + 3z = 55
1. y(∂z /∂y)
2. -y(∂z /∂y)
3. 2y(∂z /∂y)
4. 2y(∂z /∂x)
-y(∂z /∂y)
1. (x-5)2 + (y+5)2 = 25
2. (x + 5)2 + (y+5)2=25
3. (x+4)2 + (y + 4)2=25
4. (x + 6)2 + (y + 6)2=25
(x + 5)<sup>2</sup> + (y+5)<sup>2</sup>=25
1. 5
2. 6
3. 7
4. 8
6
1. 3
2. 1
3. -2
4. 2
2