MCQ
सदिश $19 \vec{i}+5 \vec{j}-6 \vec{k}$ का मापांक है
  • A
    $\sqrt{322}$
  • B
    $\sqrt{420}$
  • C
    $\sqrt{421}$
  • $\sqrt{422}$

Answer

Correct option: D.
$\sqrt{422}$
D

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