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यदि z^(2) + z + 1 = 0 जहाँ z एक सम्मिश्र...

यदि `z^(2) + z + 1 = 0` जहाँ z एक सम्मिश्र संख्या है, तो `(z+(1)/(z))^(2) + (z^(2) + (1)/(z^(2)))^(2) + (z^(3) + (1)/(z^(3)))^(2)+......(z^(6) + (1)/(z^(6)))^(2)` का मान है -

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