Question

show that n cube -n is divisible by 8 if n is an odd positive integer

Answer 1

HEY MATE HERE IS YOUR ANSWER

given to show that n cube - n is divisible by 8 if n is an odd positive integer

let the number be 5 substitute in the equation

n cube - n

= 5 cube - 5

= 125 - 5

= 120

HENCE, 120 is divided by 8

SINCE,. 120/8 = 15

THE NUMBER IS "5"

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