# State whether the expression is meaningful. If not, explain why? If so, state whether it is a vector or a scalar: abca¯.(b¯+c¯) - Mathematics and Statistics

State whether the expression is meaningful. If not, explain why? If so, state whether it is a vector or a scalar:

bar"a".(bar"b" + bar"c")

#### Solution

This is the scalar product of two vectors. Therefore, this expression is meaningful and it is a scalar.

Concept: Vectors and Their Types
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