A) n1 + n2 .... + 2(n1 + n2.....)
B) \[\sqrt{{{n}_{1}}-{{n}_{2}}+{{n}_{3}}..........}\]
C) \[\sqrt{n_{1}^{2}+n_{2}^{2}+n_{3}^{2}.........}\]
D) None of these
Correct Answer: C
Solution :
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