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Question

Write minors and cofactors of elements of following determinant. acbd

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Solution

Here, acbd Minors, M11=d,M12=b,M21=c and M22=a

Also cofactors, A11=(1)1+1M11=1×d=dA12=(1)1+2M12=(1)×b=bA21=(1)2+1M21=(1)×c=cA22=(1)2+2M22=1×a=a


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