If z^2-z+1=0 then z^n-z^-n , where n is a multiple of 3, is a 2(-1)^n. b 0. c (-1)^n+1 d none of these A Das Gupta Complex Number Que 34

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Deepak Kumar Shringi · Answer

here z=-w or -w^2 where w is complex root of unity as 1+w+w^2=0 they are asking (-w)^n that will be =(-1) n -(-1) -n =for n even it will become 0 and for n odd its also zero

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If z^2-z+1=0 then z^n-z^-n , where n is a multiple of 3, is a 2(-1)^n. b 0. c (-1)^n+1 d none of these A Das Gupta Complex Number Que 34

If z^2-z+1=0 then z^n-z^-n , where n is a multiple of 3, is
a 2(-1)^n. b 0. c (-1)^n+1 d none of these

A Das Gupta Complex Number Que 34

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If z^2-z+1=0 then z^n-z^-n , where n is a multiple of 3, is a 2(-1)^n. b 0. c (-1)^n+1 d none of these A Das Gupta Complex Number Que 34

If z^2-z+1=0 then z^n-z^-n , where n is a multiple of 3, is a 2(-1)^n. b 0. c (-1)^n+1 d none of these A Das Gupta Complex Number Que 34

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If z^2-z+1=0 then z^n-z^-n , where n is a multiple of 3, is
a 2(-1)^n. b 0. c (-1)^n+1 d none of these

A Das Gupta Complex Number Que 34