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If A=[(3,-5),(-4,2)], then the value of ...

If `A=[(3,-5),(-4,2)]`, then the value of `A^(2)-5A` is equal to -

A

I

B

14I

C

0

D

none of these

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The correct Answer is:
B
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 4
  1. If p ne 0, then the solutions of the equation |(1,1,x),(p+1,p+1,p+x),...

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  2. If A and B are two square matrices and if A^(-1) and B^(-1) exist, th...

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  3. If A=[(3,-5),(-4,2)], then the value of A^(2)-5A is equal to -

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  4. If A=|(5,6,-3),(-4,3,2),(-4,-7,3)| then the cofactors of the elements ...

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  5. If A=[(a,b),(b,a)]and A^(2)=[(alpha,beta),(beta,alpha)], then -

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  6. If A=[(1,2),(2,3),(3,4)] and B=[(1,2),(2,1)], then -

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  7. If A=[(2,-1),(0,1)] and B=[(1,0),(-1,-1)] then (A+B)^(2) is not equal ...

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  8. If A be any n xx n matrix and k any scalar, then detkA is equal to -

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  9. The probability that in a year of 22nd century chosen at rendom, ther...

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  10. The probability that in a family of 5 members, exactly 2 members have...

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  11. A bag contains 5 white and 3 black balls and 4 balls are successively ...

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  12. The probability that A speaks truth is (4)/(5), while this probabili...

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  13. Three distinct numbers are selected from first 100 natural numbers. Th...

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  14. In a bolt factory three machines A, B and C manufacture respectively 2...

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  15. If x gt 0, then the value of sin[cot^(-1)cos(tan^(-1)x)] is equal to -

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  16. If theta=sin^(-1)[sin(-600^(@))], then one of the possible values of t...

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  17. If vectors vecalpha,vecbeta, vecgamma are such that vecalpha+vecbeta+...

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  18. If hati+hatj+hatk, 2hati +5hatj, 3 hati+2hatj-3hatk and hati-6hatj-h...

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  19. In the equation x^2-px+q=0 ratio of the roots are 2:3 ,then prove that...

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  20. If the probability that a randomly selected bulb produced by a factory...

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