а(3; -1; 5) >>> 2а(6; -2; 10)
b(-2; 1; 3)
2а-b( 6-(-2); -2-1; 10-3 ) >>> 2a-b(8; -3; 7)
|2a-b| = √(8²+(-3)²+7²) = √(64+9+49) = √122
Ответ: √122.
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Answers & Comments
а(3; -1; 5) >>> 2а(6; -2; 10)
b(-2; 1; 3)
2а-b( 6-(-2); -2-1; 10-3 ) >>> 2a-b(8; -3; 7)
|2a-b| = √(8²+(-3)²+7²) = √(64+9+49) = √122
Ответ: √122.