prove that a necessary and sufficient condition for a non negative integer n to be divisible by a positive integer d is that n mod d = 0?
回答 (2)
2016-09-18 9:30 pm
I always spend my half an hour to read this blog's posts daily along with a mug of coffee.
2015-11-15 5:12 pm
d|n ⇔ n ≡ 0 mod d
d|n ⇔ n=kd+0
for some positive integer k
⇔ n-0 is a multiple of d
⇔ n ≡ 0 mod d
d|n ⇔ n=kd+0
for some positive integer k
⇔ n-0 is a multiple of d
⇔ n ≡ 0 mod d
收錄日期: 2021-04-21 15:02:25
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