【单选题】【消耗次数:1】
欲证明集合S上运算+能够构成阿贝尔群,不需要验证什么:
封闭;
有幺元且都有逆元;
等幂律;
交换律与结合律。
参考答案:
复制
纠错
相关题目
【单选题】 欲证明集合S上运算○能够构成群,不需要验证○在S上具有什么性质:
①  封闭与结合律;
②  都有逆元;
③  交换律;
④  有幺元。
【单选题】 欲证明集合S上运算○能够构成群,不需要验证○在S上具有什么性质:
①  封闭与结合律;
②  都有逆元;
③  分配律;
④  有幺元。
【单选题】 欲证明集合S上运算○能够构成群,不需要验证○在S上具有什么性质:
①  封闭与结合律;
②  都有逆元;
③  有零元;
④  有幺元。
【单选题】 欲证明集合S上运算○能够构成独异点,不需要验证○在S上具有什么性质:
①  结合律;
②  封闭;
③  有零元;
④  有幺元。
【单选题】 欲证明集合S上运算加法+和乘法o能够构成环,不需要验证什么:
①  加法+是阿贝尔群;
②  乘法o是半群;
③  乘法o对加法+可分配;
④  加法+对乘法o可分配。
【判断题】 矩阵的乘法满足交换律、结合律和分配率。
①  正确
②  错误
【判断题】 半群满足交换律。
①  正确
②  错误
【判断题】 关于整数集合上的普通的减法运算具有结合律。
①  正确
②  错误
【单选题】 设*为集合 S上可交换、可结合的二元运算, 若 a, b 是 S 上关于*运算的幂等元,则可以推断a*b 是:
①  幂等元;
②  不一定是幂等元;
③  幺元;
④  自逆元。
【判断题】 矩阵乘法满足交换律,即 AB=BA.
①  正确
②  错误
随机题目
【单选题】 A: Merry Christmas! B: [填空].
①  The same to you
②  Thank you
③  I hope so
④  Merry Christmas!
【单选题】 A: Where does he come from? B: [填空], but her accent suggests Beijing.
①  Im sure
②  Im not sure
③  Perhaps
④  Maybe
【单选题】 A: I have an appointment with Dr. Lee. B: [填空]
①  Please wait for a minute.
②  Are you sick?
③  Tell me about your appointment.
④  Dr. Lee didnt tell me.
【单选题】 A: Havent seen you for ages! What are you busy with now? B: [填空].
①  Long time no see
②  Glad to see you
③  Yeah, thanks for coming
④  I am working part time in a bookshop, you know
【单选题】 A: Hey, whats up? B: [填空].
①  Oh, nothing
②  Not too bad
③  I m pleased.
④  Im fine
【单选题】 A: What do you think of the book? B: [填空].
①  Its very interesting
②  I like it very much
③  I dont know the title
④  Its a pleasure
【单选题】 A: Its getting late. Im afraid I must be going now. B: Ok. [填空].
①  See you
②  Take it easy
③  Go slowly
④  Stay long
【单选题】 A: [填空]? B: Do you have a doll?
①  What do you want to sell
②  Shall I help you
③  Do you like a doll
④  What can I do for you
【单选题】 A: Im having a barbecue next Saturday. [填空]. B: Sure. That would be wonderful. What time?
①  I have invited some of my friends to come
②  Will you be free at that time?
③  Im looking forward to it
④  I was wondering if youd like to come
【单选题】 A: Ive got your invitation. B: Oh, good. [填空]
①  Thanks a lot.
②  Ill take it.
③  Can you come?
④  May I help you?