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A matrix of order 3xx3 has determinant 2...

A matrix of order `3xx3` has determinant 2. What is the value of `|A(3I)|` , where `I` is the identity matrix of order `3xx3` .

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To find the value of \(|A(3I)|\), where \(A\) is a \(3 \times 3\) matrix with determinant \(2\) and \(I\) is the identity matrix of order \(3\), we can use the properties of determinants. ### Step-by-Step Solution: 1. **Understand the Problem**: We need to calculate the determinant of the product of the matrix \(A\) and \(3I\). 2. **Use the Property of Determinants**: The determinant of the product of two matrices is equal to the product of their determinants: \[ ...
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RD SHARMA-DETERMINANTS-Solved Examples And Exercises
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  2. If A and B are non-singular matrices of the same order, write wheth...

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  3. A matrix of order 3xx3 has determinant 2. What is the value of |A(3...

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  4. If A and B are square matrices of order 3 such that |A|=-1 , |B|=3 ...

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  7. If |[2x+5, 3], [5x+2, 9]|=0 , find xdot

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  8. Find the value of x from the following: |[x,4], [2, 2x]|=0

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

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

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

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  14. Evaluate: |cos15osin15osin75ocos75o| .

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  15. If A=[[5 ,3 ,8 ],[2 ,0 ,1 ],[1, 2, 3]] . Write the cofactor of the e...

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  16. 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 |[2x,x+3 ],[2(x+1),x+1]|=|[1, 5],[ 3 ,5]| , then write the value ...

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

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

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  20. If A is a3x3 matrix, |A| != 0 and |3A|=k|A| , then write the value of ...

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