[a , ,b , ; ,a b] = - Vidyadip

Question

$[a\,\,b\,\;\,a \times b] = $

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Answer

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

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