Prove that 5 divides n(n+1)(2n+1) for any n€N
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see if u put n=1 u get....1.2.3=6 which is not divisible by 5.....
if u put n=2 u get 2.3.5 which Is divisible by 5....
but if u put n=3 u get 3.4.7 which is not divisible by 5 ..... so i think that ur statement is wrong its not valid for all n belongs to N
if u put n=2 u get 2.3.5 which Is divisible by 5....
but if u put n=3 u get 3.4.7 which is not divisible by 5 ..... so i think that ur statement is wrong its not valid for all n belongs to N
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