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If A = [(2,0),(1,5)]" and B"=[(1,4),(2,0...

If A = `[(2,0),(1,5)]" and B"=[(1,4),(2,0)]` then |adj(AB)|=

A

`-40`

B

`-80`

C

`-60`

D

`-20`

Text Solution

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The correct Answer is:
B
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PREMIERS PUBLISHERS-APPLICATIONS OF MATRICES AND DETERMINANTS -SOLUTION TO EXERCISE 1.8
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  3. If A = [(2,0),(1,5)]" and B"=[(1,4),(2,0)] then |adj(AB)|=

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  8. If A^(T).A^(-1) is symmetric, then A^(2)=

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  10. A = [((3)/(5),(4)/(5)),(x,(3)/(5))] "and" A^(T)=A^(-1), then the value...

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  11. If A = [(1,tan""(theta)/(2)),(-tan""(theta)/(2),1)] and AB = I(2), the...

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  12. If A=[[cos theta,sin theta],[-sin theta,cos theta]] and A(adj A)=[[k,0...

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  13. If A=[(2,3),(5,-2)] be such that lambdaA^(-1) = A, then lambda is

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  14. If adj A=[[2,3],[4,1]] and adj B=[[1,-2],[-3,1]] then adj (AB) is :

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  15. The rank of the matrix [(1,2,3,4),(2,4,6,8),(-1,-2,-3,-4)] is

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  17. Which of the following is/are correct ? (i) Adjoint of a symmetric m...

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  18. If rho (A) = rho ([A|B]), then the system AX = B of linear equations i...

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  19. If 0lt= thetalt=pi and the system of equations x+(sintheta)y- (costhet...

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  20. The augmented matrix of a system of linear equations is [(1,2,7,3),(0,...

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