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[Issue Essay]

试题详情

题目:

Analytical!

选项:

答案:

提问:

On his drive to work, Leo listens to one of three radio stations, A, B, or C. He first turns to A. If A is playing a song he likes, he listens to it; if not, he turns to B. If B is playing a song he likes, he listens to it; if not, he turns to C. If C is playing a song he likes, he listens to it; if not, he turns off the radio. For each station, the probability is 0.30 that at any given moment the station is playing a song Leo likes. On his drive to work, what is the probability that Leo will hear a song he likes? 这个题目的0.3为什末代指在A station 播放到了自己喜欢的?不太理解0.3到底指的是甚麽

解答:

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解答: 徐小梅

提问:

请老师讲一下思路

解答:

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解答: 徐小梅老师

提问:

请老师讲下第七题思路。我的理解是条件1可以判断,想要成立则xy的个位数应该是5或者0,这样次方之后依然是5或者0,即xy的个位应该相等,所以答案是No。老师,我是错误理解题意了吗?

解答:

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解答: 徐小梅老师

提问:

徐老师讲下第六题,是用捆绑法吗?做这种题特别没有思路,怎么办?

解答:

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解答: 徐小梅老师

提问:

求问解题思路

解答:

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解答: 徐小梅老师

提问:

请问这两题的解题思路

解答:

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解答: 徐小梅老师

提问:

请问这一题的解题思路

解答:

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阅读361347
解答: 徐小梅老师

提问:

求问解题思路

解答:

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阅读334720
解答: 徐小梅老师

提问:

求问解题思路

解答:

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解答: 徐小梅老师

提问:

条件一:(30+⏹)(20+🔼)=864化简为20🔼-🔼^2=64 然后从2开始带入,得出当🔼=4时成立。条件二:⏹✖️🔼=24得出3、8和4、6两组可能解,分别带入,只有36和24成立,所以条件二充分。请问以上这个解题思路对吗,或者说有更简便的?

解答:

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解答: 徐小梅老师

提问:

第14题 请徐老师解答 谢谢!

解答:

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解答: 徐小梅老师

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