1. Find vectorForm(A,B)
`A=(3,1,1)`,`B=(-1,2,1)`

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

`vec (AB)`

`=(B_1-A_1,B_2-A_2,B_3-A_3)`

`=(-1-3,2-1,1-1)`

`=(-4,1,0)`

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2. Find vectorForm(B,A)
`A=(2,3,1)`,`B=(0,5,6)`,`C=(2,3,1)`

Solution:
Here `vec A=(2,3,1),vec B=(0,5,6),vec C=(2,3,1)`


`vec (BA)`

`=(A_1-B_1,A_2-B_2,A_3-B_3)`

`=(2-0,3-5,1-6)`

`=(2,-2,-5)`

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