Question

aratati ca 1*(-3)=-3 legea de compozitie x*y=1/3xy+x+y​

Answer 1

1*(-3)=

$\frac{1}{3} \times 1 \times ( - 3) + 1 - 3 = \\ \frac{ - 3 \times 1 \times 1}{3} - 2 = \\ - 1 - 2 = - 3$