# State whether the expression is meaningful. If not, explain why? If so, state whether it is a vector or a scalar: abc(a¯.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"c" is a vector, bar"a".bar"b" scalar and scalar product of vector and scalar is not defined.

Concept: Vectors and Their Types
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