Question

explain why n(n-1) must be an even number.

Answer 1

Answer:

IF U WILL ENTER ANY INTEGER IN PLACE OF n U will get always an even No. this proves that this is an even no..

Step-by-step explanation:

HOPE U UNDERSTOOD IT WELL

Answer 2

Answer:

let n be 2

then 2(2-1)=2

now let n be 3

then 3(3-1)=6

Step-by-step explanation:

hence proved .