Matrice And Determinants 0.1) If A = 2 0 3 1 | and B = 1 -1 -2 -1 then find (AB)-1
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→Answer :
Given A=[
α
1
0
1
],B=[
1
5
0
1
]
⇒A
2
=[
α
1
0
1
][
α
1
0
1
]=[
α
2
α+1
0
1
]
Also, given A
2
=B
⇒[
α
2
α+1
0
1
]=[
1
5
0
1
]
⇒α
2
=1 and α+1=5
Which is not possible at the same time
Therefore no real values of α exists
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