यदि z1/z2 एक शुद्ध काल्पनिक संख्या है त...

यदि `z_1/z_2` एक शुद्ध काल्पनिक संख्या है तो सिद्ध कीजिए कि `|z_(1)+z_(2)|^(2) = |z_1|^(2) +|z_2|^(2)`

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