Let omega be a complex cube root of unit...

Let `omega` be a complex cube root of unity with `omega!=1a n dP=[p_(i j)]` be a `nxxn` matrix withe `p_(i j)=omega^(i+j)dot` Then `p^2!=O ,when=` a.`57` b. `55` c. `58` d. `56`

A

57

B

55

C

58

D

56

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B, C, D

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