1.
2.
3.
4.
1. {4}
2. {-4}
3. {±4}
4. does not exist
{±4}
1. {-1, 1, 1}
2. {0,1,2}
3. {±1, ±2}
4. {0, ±2}
{-1, 1, 1}
1. 0
2. ∞
3. 1
4. a
1
1. {0}
2. {1, 0, -1}
3. {0, -1}
4. {1, -1}
{1, -1}
1. 0
2. 1
3. 2
4. 1/2
0
1. 9
2. 3
3. 27
4. none
27
1. x
2. y
3. z
4. none
y
1. {(1,2), (2,-1), (3, 5)}
2. {(2,4),(4,-2), (6, 10)}
3. {(1/2, 4), (1,-2), (3/2,10)}
4. {(1/2, 2),(1,-1),(3/2,5)}
{(1,2), (2,-1), (3, 5)}
1. 1
2. 3
3. √3
4. 3√3
3√3