Question

n^2– 1 is divisible by 8, if n is
(A) an integer (B)
a natural number
(C) an odd integer (D) an even integer

Answer 1

@dan815

Answer 2

odd

Answer 3

How ?

Answer 4

even number ^2 -1 will give you an even number -1 = odd number
therefore 8 cannot divide it

Answer 5

ok

Answer 6

ok

Answer 7

odd number^2 - 1 = always odd - 1 = some even number that is div by 8 you must prove this statement

Answer 8

ok..

Answer 9

Thank you

Answer 10

we can use indution to prove

Answer 11

induction *

Answer 12

OK