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If A and B are square …

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If A and B are square matrices of the same order such that |A|=3 and AB=I,then find |B|.

Posted by Aman Kumar 6 years, 8 months ago

CBSE > Class 12 > Mathematics

8 answers

Pooja Bora 6 years, 8 months ago

Bcoz I is an identity matrix = 1

Pooja Bora 6 years, 8 months ago

See the page no. 128 theorem 3 ...acc to to this lABl=lAl.lBl...-> |I| =3|B|...->|B|= 1/3

Pooja Bora 6 years, 8 months ago

I think 1/3 hoga

Tamanna Yadav 6 years, 8 months ago

|B|=3,becaz B=A^-1 to jo A ka magnitude h vahi B ka rehga inverse karne se mag change ni hota

Jas Kaur 6 years, 8 months ago

No Its 1 IBI=1

Jas Kaur 6 years, 8 months ago

??

Jas Kaur 6 years, 8 months ago

Or any other ans.

Jas Kaur 6 years, 8 months ago

May be 9 is the ans.

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