माना A^ → = 2î + ĵ, B = 3ĵ - k̂ तथा C^ → =

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  • माना A^ → = 2î + ĵ, B = 3ĵ - k̂ तथा C^ → =

माना $\mathop A\limits^ \to = 2\hat i + \hat j,\,B = 3\hat j - \hat k$ तथा $\mathop C\limits^ \to = 6\hat i - 2\hat k$ तो $\mathop A\limits^ \to - 2\mathop B\limits^ \to + 3\mathop C\limits^ \to $ का मान होगा

A

$20\hat i + 5\hat j + 4\hat k$

B

$20\hat i - 5\hat j - 4\hat k$

C

$4\hat i + 5\hat j + 20\hat k$

D

$5\hat i + 4\hat j + 10\hat k$
माना $\mathop A\limits^ \to = 2\hat i + \hat j,\,B = 3\hat j - \hat k$ तथा $\mathop C\limits^ \to = 6\hat i - 2\hat k$ तो $\mathop A\limits^ \to - 2\mathop B\limits^ \to + 3\mathop C\limits^ \to $ का मान होगा
$\mathop A\limits^ \to - 2\mathop B\limits^ \to + 3\mathop C\limits^ \to = (2\hat i + \hat j) - 2(3\hat j - \hat k) + 3(6\hat i - 2\hat k)$
$ = 2\hat i + \hat j - 6\hat j + 2\hat k + 18\hat i - 6\hat k$
= $20\hat i - 5\hat j - 4\hat k$