координати вектора:
]
[tex]ab = (x2 - x1)(y2 - y1)[/tex]
АВ = ( -4-2;-8,5-(-3,3)) = (-6;-5,2)
АС = (3-2;-1,5-(-3,3)) = (1;1,8)
Довжина вектора:
[tex] |ab| = \sqrt{( - 4 - 2) {}^{2} ( - 8.5 - ( - 3.3)) {}^{2} } [/tex]
= (6;27,04)
[tex] |ac| = \sqrt{(3 - 2) {}^{2}( - 1.5 - - 3.3) {}^{2} } = [/tex]
= (1;3,24)
Объяснение:
скалярний добуток:
[tex]a \times b = a1 \times b2 + a2 \times b2 = 2 \times - 4 + - 3.3 \times - 8.5 = - 8 + 28.05 = 20.05[/tex]
[tex]a \times c = 2 \times 3 + - 3.3 \times - 1.5 = 6 + 4.95 = 9.95[/tex]
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Answers & Comments
координати вектора:
]
[tex]ab = (x2 - x1)(y2 - y1)[/tex]
АВ = ( -4-2;-8,5-(-3,3)) = (-6;-5,2)
АС = (3-2;-1,5-(-3,3)) = (1;1,8)
Довжина вектора:
[tex] |ab| = \sqrt{( - 4 - 2) {}^{2} ( - 8.5 - ( - 3.3)) {}^{2} } [/tex]
= (6;27,04)
[tex] |ac| = \sqrt{(3 - 2) {}^{2}( - 1.5 - - 3.3) {}^{2} } = [/tex]
= (1;3,24)
Объяснение:
скалярний добуток:
[tex]a \times b = a1 \times b2 + a2 \times b2 = 2 \times - 4 + - 3.3 \times - 8.5 = - 8 + 28.05 = 20.05[/tex]
[tex]a \times c = 2 \times 3 + - 3.3 \times - 1.5 = 6 + 4.95 = 9.95[/tex]