MUST use A times indetity matrix method to prove it is not possible and explain why...

Question

Question

MUST use A times indetity matrix method to prove it is not possible and explain why it is ntot possible by looking the matrix turns out

DO NOT use determine method 4-4 =0 is not possible!!!

Let Find A-1 if possible. If A- does not e determine why

math algebra

Answer 1

Answer #1

2	1
4	2

add the Identity Matrix to the right

2	1	1	0
4	2	0	1

Divide row1 by 2

1	1/2	1/2	0
4	2	0	1

Add (-4 * row1) to row2

1	1/2	1/2	0
0	0	-2	1

Divide row2 by -2

1	1/2	1/2	0
0	0	1	-1/2

Add (-1/2 * row2) to row1

1	1/2	0	1/4
0	0	1	-1/2

Last row of a matrix is zero so, The rows and columns are not independent. so matrix is not invertible

Answer 2

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