Step 1 :

Definition of vector addition and scalar multiplication :

Let and be vectors and let k be a scalar.

Then the sum of u and v is the vector :

The scalar multiple of k times u is the vector :

Definition of the dot product :

The dot product of and  is

Step 2 :

The vectors are and

The expression is

Evaluation of :

Evaluation of :

Evaluation of :

Thus,

The value of and it is a vector.

Solution :

The value of and it is a vector.