1. unit matrix
2. scalar matrix
3. null matrix
4. diagonal matrix
scalar matrix
1. 7/6
2. 5/6
3. 6/7
4. 5/7
6/7
1. -6, -12, -18
2. -6, 4, 9
3. -6, -4, -9
4. -6, +12, 18
-6, -4, -9
1. straight line
2. parabola
3. circle
4. hyperbola
straight line
1. -2
2. -1
3. 1
4. 2
1
1. 0.5
2. 0.6
3. 0.7
4. 0.8
0.5
1. i
2. -1
3. 1
4. -i
-i
1. 56
2. 55
3. 46
4. 45
45
1. 16cos4θ – 12cos2θ + 1
2. 16cos4θ + 12cos2θ + 1
3. 16cos4θ – 12cos2θ – 1
4. 16cos4θ + 12cos2θ – 1
16cos4θ – 12cos2θ + 1
1. 9
2. 16
3. 25
4. 36
25