Question 6: You list an expansion matrix and linear equations.
x+y= 1
x+2y=0
-x+y+z=-2
X=2,y=- 1,z= 1。
The answer is β=2α 1-α2+α3.
Question 8: Error
The correct one should be | 2a | = 2 n | a |
Question 9: Error
The column vector of should be linearly independent.
Question 10: Error
If a and b are irreversible matrices, they are invalid.
Question 1 1: Error
You can give a counterexample.
Question 12: Correct.