Question

Daca $a*b= \frac{2}{15}$ si $a*c= \frac{11}{75}$ , calculati a*(b+c)

Answer 1

$a*(b+c)=a*b+a*c= \frac{2}{15}+ \frac{11}{75}= \frac{10}{75}+ \frac{11}{75}= \frac{21}{75}= \frac{7}{25}$