Question

urgently needed...plseeeeeeeeeee

prove n^3-n is always divisible by 8

Answer 1

plse solve it without by mathematical induction

Answer 2

n = 2 is a contradiction?

Answer 3

It's not true.

Answer 4

2^3-2 =6
4^3-4=60
6^3-6=210

Answer 5

In fact, false for all even numbers which aren't divisible by 8.

Answer 6

i know , i also put all all the values like u have put, but how to solve step by step
plsee eplain

Answer 7

It's simply not true. One counterexample is enough (n = 2)

Answer 8

okay..
@terenzreignz and @Mertsj thank u

Answer 9

Are there restrictions on n that you did not post?

Answer 10

no, there was no restrictions, only wriiten, for a positve integer n, prove it