Пошаговое объяснение:
1) а + b = ( 1+5; 1+4; 2+3) = (6; 5; 5)
2) 2a = 2 * (1; 1; 2) = (2; 2; 4)
3b = 3 * (5; 4; 3; ) = (15; 12; 9 )
2a - 3b = (2;2;4) - (15;12;9) = ( -13; -10; -5)
3) |a| = √(1²+1²+2²) = √6
|b| = √(5²+4²+3²) = √50 = 2√5
Пошаговое объяснение:
1) а + b = ( 1+5; 1+4; 2+3) = (6; 5; 5)
2) 2a = 2 * (1; 1; 2) = (2; 2; 4)
3b = 3 * (5; 4; 3; ) = (15; 12; 9 )
2a - 3b = (2;2;4) - (15;12;9) = ( -13; -10; -5)
3) |a| = √(1²+1²+2²) = √6
|b| = √(5²+4²+3²) = √50 = 2√5