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. If A = [[alpha,beta],[gamma,-alpha]] ...

. If `A = [[alpha,beta],[gamma,-alpha]]` is such that `A^2 = I`, then:

A

`I+alpha^2+betagamma = 0`

B

`I-alpha^2+betagamma = 0`

C

`I-alpha^2-betagamma = 0`

D

`I+alpha^2-betagamma = 0`

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PSEB-MATRICES-Exercise
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  16. ਮੈਟ੍ਰਿਕਸ X ਪਤਾ ਕਰੋ ਜੇਕਰ X[[1,2,3],[4,5,6]] = [[-7,-8,-9],[2,4,6]] ਹੈ।

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  17. f A and B are square matrices of the same order such that AB = BA, the...

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  19. If the matrix A is both symmetric and skew symmetric, then :

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  20. If A is square matrix such that A^2 = A,then (I+A)^3-7A is equal to:

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