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Prove that (a+b).(a+b)=|a|2+|b|2, if and only if a, b are perpendicular, given a≠0, b≠0 |
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Answer» Prove that (a+b).(a+b)=|a|2+|b|2, if and only if a, b are perpendicular, given a≠0, b≠0 |
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