1. Find -3×A
`A=(3,1,1)`

Solution:
Here `vec A=(3,1,1)`

`-3 * vec A`

`=(-3*A_1,-3*A_2,-3*A_3)`

`=(-3*3,-3*1,-3*1)`

`=(-9,-3,-3)`

---

2. Find 2×B
`B=(-1,2,1)`

Solution:
Here `vec A=(3,1,1),vec B=(-1,2,1),vec C=(3,1,1)`


`2 * vec B`

`=2*(B_1,B_2,B_3)`

`=(2*B_1,2*B_2,2*B_3)`

`=(2*(-1),2*2,2*1)`

`=(-2,4,2)`

---

---

---