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ib raportul cartezian ( o vector , i vector , j vector ) Se considera vectorii u = 2 i vector -3j vector si v vector =4 i vector+2j vector . sa se calculeze 2 u vector si v vector

Răspuns :

u=2i-3j
v=4i+2j
2u-v=2(2i-3j)-(4i+2j)=4i-6j-4i-2j=-8j