Question

show that n square minus 1 is divisible by 8 if n is an odd positive integer​

Answer 1

Answer:

(n²-1)%8=0

1²=1

3²=9

5²=25

7²=49

9²=81

from above its evident that every square of an odd number is odd

(n+1)(n-1)

let's check with n= 1

2×0=0

divisible by 8

n=3

(3+1)(3-1)=8

divisible by 8

n=5

(6)(4)=8

divisible by 8

it is evident that from here any square of odd number is divisible by 8

Answer 2

Answer:

perfect Ãñswēr is in the attachment