Question

n²-1 is divisible by 8 if n is what ​

Answer 1

Answer:

P =2 then, 4P² + 4P = 4(2)² + 4(2) =16 +8 = 24, it is also divisible by 8 .

Therefore, we conclude that 4P² + 4P is divisible by 8 for all natural number .

therefore, n²-1 is divisible by 8 for all odd value of n.

Answer 2

Answer:

hey dear ,

if n is an odd integer

then prove that

n2 -1 is divisible by 8 ...

P =2 then,

4P² + 4P

= 4(2)² + 4(2)

=16 + 8 = 24,

it is also divisible by 8 .

hence, we conclude that 4P² + 4P is divisible by 8 for all natural number .

hence, n² -1 is divisible by 8 for all odd value of n .

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