题目
题型:解答题难度:一般来源:不详
已知
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-13248.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-59922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-63101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-78885.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-43300.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-49644.gif)
(Ⅰ)令
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-94558.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-15495.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-65892.gif)
(Ⅱ)令
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105422-58214.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-43300.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105422-31357.gif)
(Ⅲ)令
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105422-66794.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105422-91682.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105421-49644.gif)
答案
解:(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105422-12285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-72701.gif)
(Ⅱ)证明:令
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-28923.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-79538.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-59922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-66107.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-59922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-66107.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-97265.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-95878.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-34955.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105420-59922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-20916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-97265.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-22279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-34955.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-40423.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-66107.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-97265.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-22279.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-34955.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-40423.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-20916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-97265.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105425-70809.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105425-99729.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-97265.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105425-68041.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105425-13122.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105425-30052.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105426-25393.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105426-16899.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105426-33301.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105426-75315.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105427-70000.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105427-12187.gif)
(Ⅲ)解:易知
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105427-18615.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105427-19645.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105427-96745.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-79538.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105423-66107.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-24111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-75538.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105424-20916.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-24111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-75538.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-54960.gif)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-45469.gif)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-42333.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-54960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-42333.gif)
法二:根据(Ⅰ)知使
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105429-46642.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-24111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105429-47754.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-54960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105429-15034.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-54960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105429-65566.gif)
两式相加得
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-54960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105428-42333.gif)
(若用其他方法解题,请酌情给分)
解析
核心考点
试题【(本小题共13分)已知,或1,,对于,表示U和V中相对应的元素不同的个数.(Ⅰ)令,存在m个,使得,写出m的值;(Ⅱ)令,若,求证:;(Ⅲ)令,若,求所有之和.】;主要考察你对集合运算等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105418-89027.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105418-44246.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105416-58612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105416-98029.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105414-38736.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105414-57274.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105414-71941.jpg)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105411-45254.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105412-12779.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105410-54530.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105410-59995.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817105410-37864.gif)
A.{4,7,9} | B.{5,7,9} | C.{3,5,8} | D.{7,8,9 } |
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