Помогите с8
пр_(vector{c})vector{b}=vector{b}*vector{c}/|vector{c}| vector{b}*vector{c}=1*(-2)+5*1+(-3)*2=-3 |vector{c}|=sqrt((-2)^2+1^2+2^2)=sqrt(9)=3 [b]пр_(vector{c})vector{b}=-3/3=-1[/b]