Question

Fie vectorii OA(2,-3), OB(1,-2). Aflati β, α apartin lui R astfel incat 3OA - 5OB = (α, β).

Answer 1

OA=2i-3j OB=i-2j 3OA-5OB=3(2i-3j)-5(i-2j)=6i-9j-5i+10j=i+j=(1,1) Adica alfa=1 si beta=1.