show that n3-n is divisible by 6
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put n= 1,2,3,4etc hence prove
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wrong question.....
if, we put n= 7,5,11....and so on
let, n=11
then, 11*3-11=22
which is not divisible by 6 at all......
if, we put n= 7,5,11....and so on
let, n=11
then, 11*3-11=22
which is not divisible by 6 at all......
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