一道急需解决的SAT2 Math问题The set of odd intergers is closed under?正答:multiplication
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一道急需解决的SAT2 Math问题The set of odd intergers is closed under?正答:multiplication
一道急需解决的SAT2 Math问题
The set of odd intergers is closed under?
正答:multiplication
一道急需解决的SAT2 Math问题The set of odd intergers is closed under?正答:multiplication
又是你啊
题目的意思是 一个整数为奇数的集合接近于下面哪个集合.?
set集合
odd 奇数
integers 整数
multiplication 在此翻译为”它们相乘的集合“,乘法有下面这种性质:
even × even = even;
even × odd = even;
odd × odd = odd.
even 为偶数
所以意思是,接近于一个与它们相乘后的集合
odd set: {1, 3, 5, 7, 9, ...}
multiply each term: { 1x3, 1x5, 1x7 ... 3x5, 3x7, 5x7, 5x9 ...} 这些同样也都是奇数
而加减法 1+3=4为偶数,就不属于奇数的集合了
一道急需解决的SAT2 Math问题The set of odd intergers is closed under?正答:multiplication
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