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If `A` and `B` are square matrices of order 3 such that `|A|=-1` , `|B|=3` , then find the value of `|3A B|` .

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RD SHARMA ENGLISH-DETERMINANTS-All Questions
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  7. Find the value of x from the following: |[x,4],[ 2 ,2x]|=0

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  8. Write the value of the determinant |[2, 3, 4],[ 5, 6 ,8],[ 6x,9x, 12...

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  9. If |A|=2 , where A is 2xx2 matrix, find |a d j\ A| .

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  10. What is the value of the determinant |[0, 2, 0 ],[2, 3, 4 ],[4, 5 ,6...

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  11. For what value of x is the matrix [[6-x,4],[ 3-x,1]] singular?

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  12. A matrix A of order 3xx3 is such that |A|=4 . Find the value of |2A| .

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  13. Evaluate: |[cos15^@ sin15^@],[sin75^@cos75^@]| .

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  15. If |(x+1,x-1),(x-3,x+2)|=|(4,-1),(1,3)|, then write the value of x .

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  17. If |[3x, 7], [-2 , 4]|=|[8, 7], [6, 4]| , find the value of xdot

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  18. If |[2x,5], [8,x]|=|[6,-2], [7, 3]| , write the value of xdot

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  19. If A is square matrix of order 3 matrix, |A| != 0 and |3A|=k|A| , then...

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  20. Write the value of the determinant |[p ,p+1],[p-1,p]| .

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