What would be the value of n for n square - 1 divisible by 8
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its 4q + 1 where q is some integer...You can take 4q + 2 or 4q + 3 also..
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Hey friend ..
Here given n^2. - 1 ..... Is divisible by 8 ...
Put
N= 3 , 5, 7, 9....
Every odd number except 1 ...
This is because n^2 -1 = (n-1)(n+1)
A= n-1
B= n+1
B-A = 2
For deciding by 8 ... N-1 and n+1 should be even number .. n should odd ... Put any odd no it will devided by 8.
Hope it will help you !!
Here given n^2. - 1 ..... Is divisible by 8 ...
Put
N= 3 , 5, 7, 9....
Every odd number except 1 ...
This is because n^2 -1 = (n-1)(n+1)
A= n-1
B= n+1
B-A = 2
For deciding by 8 ... N-1 and n+1 should be even number .. n should odd ... Put any odd no it will devided by 8.
Hope it will help you !!
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