是的
但是一般都用R实数集运算
有些时候用Q有理数集运算
数列的通项公式定义域是不是默认为正整数集,不用在后面再写n∈N+了?
数列的通项公式定义域是不是默认为正整数集,不用在后面再写n∈N+了?
数学人气:143 ℃时间:2019-10-23 04:06:08
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