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सदिश ` veca ` के लिये `। vecaxxhati ।+ । veca xx hatj ।^(2 )+ ।veca xx hatk ।^(2 )` बराबर है -A. `|veca|^(2)`B. `2|veca|^(2)`C. `3 |veca|^(2)`D. `4 |vaca|^(2)`

Answer» Correct Answer - B


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