醒目的引用

有理数系与实数系共同点都具有：运算的封闭性、有序性、稠密性 不同点有理数系对极限运算不封闭实数系对极限运算封闭 [[01-本科课程/大二上/01-Calculus/纵向总结/单调有界定理]]定理单调有界数列必收敛. 证明见书$P_{12}$ 例题wj...

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