......................пожалуйста................. Created by peterburg1. geometriya-ru

пожалуйста...

peterburg1 @peterburg1

July 2022 1 2 Report

......................пожалуйста................

Answers & Comments

Удачник66

Verified answer

A(1; 1; 5); b(2; -4; 6); c(-5; 3; 1)
1) Скалярное произведение векторов.
2a - 2c = (2; 2; 10) - (-10; 6; 2) = (2+10; 2-6; 10-2) = (12; -4; 8)
b + 3a = (2; -4; 6) + (3; 3; 15) = (2+3; -4+3; 6+15) = (5; -1; 21)
(2a - 2c)(b + 3a) = x1*x2 + y1*y2 + z1*z2 = 12*5 + (-4)(-1) + 8*21 = 232

2) Векторное произведение векторов
2a + c = (2; 2; 10) + (-5; 3; 1) = (2-5; 2+3; 10+1) = (-3; 5; 11)
2b - 3a = (4; -8; 12) - (3; 3; 15) = (4-3; -8-3; 12-15) = (1; -11; -3)
(-3; 5; 11)x(1; -11; -3) = (y1*z2-z1*y2; z1*x2-x1*z2; x1*y2-y1*x2) =
= (5(-3)-11(-11); 11*1-(-3)(-3); (-3)(-11)-5*1) = (-15+121; 11-9; 33-5) =
= (106; 2; 28)

0 votes Thanks 1

Answers & Comments

Verified answer

pozhalujstaaec690e9837ba79f857a8712d7f5fed41 83041

obrazujte slovoobrazovatelnye cepochki slov bezdelnik butylochka elochkakroshe

postrojte grafik pozhalujsta y3 2cosx 14fc213046fa3e628e9a39a6316cb871f 71725

postrojte grafik pozhalujsta y3 2cosx 1f876571075b914d809994330cbe6a3b0 93256

postrojte grafik pozhalujsta y3 2cosx 1d471b467ca76ac95615f2e4f246baad4 19133

postrojte grafik pozhalujsta y3 2cosx 1f3d5cffe2890fc1e2288585d4cadbb15 34456

3)=0...

slovoobrazovatelnaya cepochka k slovu lesnik

kak budet green i slow v prevoshodnoj i v sravnitelnoj stepeni

reshite pozhalujsta uravnenie 4sin3xsin5x 2sinxcos2x0

рекомендуемые вопросы

Helpful Links

Helpful Social