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#171 [ŽÄ“c ãÄ‘¾]
‚O�…|a+b|�…|a|+|b|
ŒÌ‚É|a+b|^2�…(|a|+|b|)^2‚ƂȂé
(|a|+|b|)^2 -|a+b|^2
=2(|a||b|-ab)�†0
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⏰:12/02/22 21:43 📱:P08A3 🆔:..aK1Ito


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