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The value of lamda so that the matric A^...

The value of `lamda` so that the matric `A^(-1)-lamdaI` is singular where `A=[{:(6,-2,2),(-2,3,-1),(2,-1,3):}]`

A

`(1)/(2) `

B

` ( 1)/(4)`

C

`( 1)/(8)`

D

`-(1)/(2) `

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The correct Answer is:
A, C
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