किन्ही दो सम्मिश्र संख्याओं z(1) और z(2)...

किन्ही दो सम्मिश्र संख्याओं `z_(1)` और `z_(2)` के लिए सिद्ध कीजिए की `|z_(1)+z_(2)| le |z_(1)|+|z_(2)|`.

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