Question

Ma puteti ajuta la exercitiul 5? Multumesc!

Answer 1

u vector+v vector=(2i vector+3j vector)+(i vector-j vector)
=2i vector+3j vector+i vector-j vector
=3i vector+2j vector

Answer 2

[tex]\it \overline{u} = 2\overline{i} +3\overline{j} \\\;\\ \overline{v} = \overline{i} -\overline{j} \\\;\\ \overline{u} + \overline{v} = (2\overline{i} +\overline{i}) +(3 \overline{j} - \overline{j}) = 3 \overline{i} +2 \overline{j}[/tex]