Question

If n is an odd integer, then show that n

2

– 1 is divisible by 8.​

Answer 1

Step-by-step explanation:

The Rule for 8: a number is divisible by 8 if the last three digits are evenly divisible by 8. For example, 17216. The last three digits are 216 and it is divisible by 8. Thus, 17216 is divisible by 8.

Answer 2

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Step-by-step explanation:

The Rule for 8: a number is divisible by 8 if the last three digits are evenly divisible by 8. For example, 17216. The last three digits are 216 and it is divisible by 8. Thus, 17216 is divisible by 8.

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