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mari892
@mari892
June 2022
1
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Векторы a и b взаимно перпендикулярны, причем |а|=5 |b|= 12. Вычислить |a+b| и |a-b|
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19G
Verified answer
А*b=IaI*IbI cos 90°=0
Ia+bI²=(a+b)²=a²+2ab+b²=IaI²+0+IbI²=5²+12²=169
Ia+bI=13
Ia-bI²=(a-b)²=a²-2ab+b²=IaI²-0+IbI²=5²+12²=169
Ia-bI=13
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Verified answer
А*b=IaI*IbI cos 90°=0Ia+bI²=(a+b)²=a²+2ab+b²=IaI²+0+IbI²=5²+12²=169
Ia+bI=13
Ia-bI²=(a-b)²=a²-2ab+b²=IaI²-0+IbI²=5²+12²=169
Ia-bI=13