MCQ
$\lambda$ ના કયા મુલ્ય માટે સદિશો $i + 2j + 3k, \lambda i + 4j + 7k, - 3i - 2j - 5k $ સમતલીય હોય ?
- A$6$
- B$5$
- C$4$
- D$3$
$\left| {\,\begin{array}{*{20}{c}} 1&2&3 \\ \lambda &4&7 \\ { - 3}&{ - 2}&{ - 5} \end{array}\,} \right|\,\, = \,\,0$
$1\,\left( { - 20\,\, + \;\,14} \right)\, - \,\,2\,\left( { - 5\lambda \,\, + \;\,21} \right)\, + \;3\,\left( { - 2\lambda \, + \,12} \right)\, = \,\,0\,\,;\,\,$
$\lambda \,\, = \,\,3$
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$\,P[B/(A \cup B)^c] = .....$