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Determine the matrix A, when A=4[{:(1,2,...

Determine the matrix A, when `A=4[{:(1,2,3),(-1,-2,-3),(4,2,6):}]+2[{:(5,4,1),(3,2,4),(3,8,2):}]`

A

`[{:(-14,16,14),(-2,-4,-4),(22,24,28):}]`

B

`[{:(14,-16,14),(2,-4,-4),(22,24,28):}]`

C

`[{:(14,16,14),(2,-4,-4),(22,24,28):}]`

D

`[{:(-14,16,14),(2,-4,-4),(-22,24,-28):}]`

Text Solution

Verified by Experts

The correct Answer is:
C
`A=[{:(4,8,12),(-4,-8,-12),(16,8,24):}]+[{:(10,8,2),(6,4,8),(6,16,4):}]`
=`[{:(4+10,8+8,12+2),(-4+6,-8+4,-12+8),(16+6,8+16,24+4):}]=[{:(14,16,14),(2,-4,-4),(22,24,28):}]`
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ARIHANT MATHS ENGLISH-MATRICES -Exercise (Questions Asked In Previous 13 Years Exam)
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  5. If A^(2)-A+I=O, then A^(-1) is equal to

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  6. Let {:A=[(1,0,0),(2,1,0),(3,2,1)]:}and U1,U2,U3 be column matrices sat...

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  7. Let A = [(1,0,0), (2,1,0), (3,2,1)], and U1, U2 and U3 are columns of ...

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  12. Let A and B be 3xx3 matrtices of real numbers, where A is symmetric, "...

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  13. Let A be a square matrix all of whose entries are integers. Then wh...

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  14. Let A be a 2xx2 matrix with real entries. Let I be the 2xx2 identi...

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  15. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  16. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  17. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  18. Let A be a 2xx2 matrix Statement -1 adj (adjA)=A Statement-2 abs(a...

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