[a , ,b , ,a b] is equal to - Vidyadip

MCQ

$[a\,\,b\,\,a \times b]$ is equal to

A
$|\,\,a \times b|$
✓
$|\,\,a \times b{|^2}$
C
$0$
D
None of these

✓

Answer

Correct option: B.

$|\,\,a \times b{|^2}$

b
(b) We have $[a\,\,b\,\,a \times b] = (a \times b)\,.\,(a \times b) = \,|a \times b{|^2}$.

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