Question

EXAMPLE 2
Prove that (1? + n) is divisible by 2 for any positive integer n.
[CBSE 2019C]​

Answer 1

Answer:

Step-by-step explanation:

If n=2p+1 then n−1=2p+1−1=2p. The number is divisible by 2. So, any number in the form of n3−n=n(n+1)(n−1) is divisible by 2.

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