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JEE Class main Answered

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question image
Asked by bhatimahipalsingh21 | 11 Mar, 2024, 08:49: PM
answered-by-expert Expert Answer

Given matrix A is

img

Let us do the following elemntary operations

R4-R3 gives

img

R3-R2 gives

img

R2-R1 gives

img

R4- (5 ×R3) gives

img

C4-C3 gives

img

C3-C2 gives

img

C2-C1 gives

img

Similarly the subsequent operations C4-C3 , C3-C2 ans R3-R2 gives

img

Finally, we get non reduceable minor   img  of order  2

Hence rank of matrix A is 2

 

 

 

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