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Question

If A=⎡⎢⎣122232223242324252⎤⎥⎦, then the minor of a22 is

A
56
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B
51
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C
43
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D
41
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Solution

The correct option is B 56
Given, A=122232223242324252
So, By property of minor (1),
minor of a22=M22(1)2+2=M22
=12323252
=259×9
=56

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