數論之Linear Congruences in one variable之一個小問題(2008/05/12)
根據定義def Let a,bZ.A congruence of the form axbmod m is said to be a linear congruence in the variable x.
那以下問題請翻譯並講解一下!!
2x3mod5.
the solution set for this congruence is {...,-6,-1,4,9,...}.Even though there are infinitely many congruence modulo5,there is exactly one incongruent solution to the congruence modulo5,namely4.
這句話是什麼意思呢?
他的解集合是 {...,-6,-1,4,9,...}.~雖然有無線多同餘五~但是只有一個不與3同餘5的數字叫做4~
可是把四代進去~可以被五整除阿
為什麼帶入四不同餘阿~
這句話到底什麼意思呢?
請高手解答!!