Dane są punkty A(-3,2), B(1,4), C(3,-5), D(-1,-7). Oblicz współrzędne wektorów: AB+2CD.
Janek191
A =(-3;2), B =(1;4), C=(3;-5), D = (-1;-7) Wektor AB =[1-(-3); 4-2] = [4; 2] Wektor CD = [-1 -3;-7 -(-5)] = [ -4; -2] Wektor AB + 2 CD = [4;2] + [-8;-4] = [4-8;2-4] = [-4; -2]
Wektor AB =[1-(-3); 4-2] = [4; 2]
Wektor CD = [-1 -3;-7 -(-5)] = [ -4; -2]
Wektor AB + 2 CD = [4;2] + [-8;-4] = [4-8;2-4] = [-4; -2]