A) 4
B) 6
C) 10
D) None of these
Correct Answer: B
Solution :
\[n({{n}^{2}}-1)=(n-1)\,(n)\,(n+1)\] It is product of three consecutive natural numbers, so according to Langrange's theorem it is divisible by 3 ! i.e., 6.You need to login to perform this action.
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