Let z= -1 + √3i/2, where i = √-1, and r,s ∊ {1,2,3}. Let P = ⎡(-z)ʳ z²ˢ ⎤
⎣ z²ˢ zʳ ⎦
and I be the identity matrix of order 2. Then the total number of ordered
pairs (r, s) for which P2= – I is
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Sorry mate !!!!!!! I don't know the answer but thanks for the free 15 points
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