1) Care este forma generală a unui vector în reperul cartezian? 2) Dacă v¯=-i¯+4j¯, care sunt coordonatele sale? 3) Calculați lungimea vectorului v¯=3i¯-4j¯ 4) Care este vectorul de poziție al punctului P(-5,-1)? 5) Dacă A(2,-6) și B(3,-4), aflați vectorul AB¯

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