# 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 meaningless because bar"a" is a vector, bar"b".bar"c" is a scalar and the scalar product of vector and scalar is not defined.

Concept: Vectors and Their Types
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