Question

Matrice And Determinants 0.1) If A = 2 0 3 1 | and B = 1 -1 -2 -1 then find (AB)-1​

Answer 1

→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