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Let A=31-16-5, then the sum of all the elements of A50 is equal to

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Important Questions on Matrices

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JEE Main/Advance
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If 3A=12221-2x2y and ATA=AAT=I, then xy is equal to
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Let A=-5-8035012-1 and B=A+A2+A4+A8+....+A278 then sum of all the elements of matrix B is equal to
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If A,B and A+B are idempotent matrices, then 
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Let t be the trace of the matrix 

A=x+yx+yα1β1α2y+zy+zβ2α3β3z+xz+x, then 

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Let A be an involutory matrix and S be the set containing solution of Ax=I. Then minimum value of xSsinxθ+cosxθ (Given that xN).
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An orthogonal matrix is 
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matrix 0-4140-5-150 is 
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Let A=1xn-xn1, then limnAn is