Question

n^2-1 is divisible by 8, if n is ______ number​

Answer 1

Answer:

Let n = 5

Hence n^2-1= 5^2-1=25-1=24

24 is divisible by 8 if n= 5 Ans.

Answer 2

Answer:   n = (8k+1)^1/2

Step-by-step explanation:

if  n^2 - 1 is divisible by 8, that means,

(n^2 - 1) / 8 = constant = k(let)

Therefore,  n^2 = 8k + 1

                 n = (8k + 1)^1/2 (ANSWER)

So by putting different values of k( like 0, 1, 2, 3,.........)

you will get different values of n.

In actual n has infinitely many values.

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