1) с=a+b
2) c=2a+b
x_(vector{c})=x_(vector{a})+x_(vector{b})=3+7=10
y_(vector{c})=y_(vector{a})+y_(vector{b})=0+0=0
z_(vector{c})=z_(vector{a})+z_(vector{b})=4+2=6
vector{c}=(10;0;6)
б)
x_(vector{c})=2*x_(vector{a})+x_(vector{b})=2*3+7=13
y_(vector{c})=2*y_(vector{a})+y_(vector{b})=2*0+0=0
z_(vector{c})=2*z_(vector{a})+z_(vector{b})=2*4+2=10
vector{c}=(13;0;10)