英语翻译
题目
英语翻译
1.Show that for any sequencex 0,x 1 ,x 2 …….of distinet reals there is a sequence a0,b0,a1,b1,a,b2… …of the type deseribed above.
2.Give a rule for continuing the sequence.1/2,1/3,1/4,3/4,1/5,2/5,3/5,4/5,… that will include all rationals in(0,1).
3.Construct a linear fraetional ,apping of(0,1) onto the positive reals.Use this or another method to conclude that the set of positive rationals is countable.How can one then conelude that the set of all rationals is countable?
4.The words on a fixed finite alphabet can be enumerated by listing first the one-letter words,then the weo-letter words,and so on.Use this observation to show that the set of polynomial equations with integer coefficients is countable and hence that the set of algebraic numbers is countable.
答案
1.Show那为任何sequencex 0,x 1,x 2…….ofdistinet reals有一序列a0,b0,a1,b1,a,b2……of类型deseribed在上方的.
2.一个关于3/5 4/5继续sequence.1/2,1/3,1/4,3/4,1/5,2/5的规定2.Give,意愿在中包含所有的合理的事物的…((01).
只会这2句
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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