assume b=a^n
a^a = b^b => a^a = (a^n)^(a^n)
=> a^a = a^(na^n)
=> a = na^n
=> 1 = n a^ (n-1)
=> a = (1/n) ^(1/(n-1))
since n = 1, 2, ..... , each n has a pair of a = (1/n)^(1/(n-1)), b = (1/n)^(n/(n-1))
assume b=a^n
a^a = b^b => a^a = (a^n)^(a^n)
=> a^a = a^(na^n)
=> a = na^n
=> 1 = n a^ (n-1)
=> a = (1/n) ^(1/(n-1))
since n = 1, 2, ..... , each n has a pair of a = (1/n)^(1/(n-1)), b = (1/n)^(n/(n-1))
•
first two pairs (n starts from 2)
-leo爸-
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(88 bytes)
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11/02/2011 postreply
05:46:41
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Leo爸,高,是在是高!您怎么想到assume b=a^n的?I FULE U! 谢谢啦!
-thegreatcolour-
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(31 bytes)
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11/02/2011 postreply
06:03:31
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我一直告诉Leo,做数学要拿出笔和纸
-leo爸-
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(72 bytes)
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11/02/2011 postreply
06:06:31
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文房四宝才用了一半就这么了得。我也曾试到Log,然后,
-thegreatcolour-
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(265 bytes)
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11/02/2011 postreply
06:18:56
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还不够严密
-yddad-
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(113 bytes)
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11/02/2011 postreply
07:29:49
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回复:还不够严密
-yddad-
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(148 bytes)
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11/02/2011 postreply
08:29:37
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对。谢谢你!幸亏闺女没这么反问我。哪位高人能给出证明吗?(NULL)
-thegreatcolour-
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11/02/2011 postreply
09:41:11
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回复:对。谢谢你!幸亏闺女没这么反问我。哪位高人能给出证明吗?(NULL)
-yddad-
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(201 bytes)
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11/02/2011 postreply
10:09:54
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初等代数能证明题中的infinite吗?可能还得用下面的BeLe先生的微积分的思路。(NULL)
-thegreatcolour-
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11/02/2011 postreply
11:05:11
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初等代数不用严格的证明
-yddad-
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(201 bytes)
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11/02/2011 postreply
11:25:35
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说只有 n=1 时 a=b, 毫无意义。n 不能是1,因为你不能除零。
-michigan007-
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11/02/2011 postreply
12:23:15
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leo爸的证明是正确的。您的担心是多余的。
-michigan007-
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(1868 bytes)
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11/02/2011 postreply
12:21:06
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n 是无限的,不一定由它组成的函数是无限的。
-yddad-
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11/02/2011 postreply
12:55:15
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Again, 您的担心是多余的。
-michigan007-
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(1507 bytes)
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11/02/2011 postreply
16:26:11
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回复:Again, 您的担心是多余的。
-yddad-
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(193 bytes)
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11/02/2011 postreply
18:29:02
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You were confused
-michigan007-
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(676 bytes)
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11/03/2011 postreply
06:25:20
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我没有说他是是错的只是说不严密
-yddad-
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(445 bytes)
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11/02/2011 postreply
13:27:21
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Where is your logic?
-michigan007-
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11/02/2011 postreply
16:28:30
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we are using different logic.
-yddad-
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11/02/2011 postreply
18:50:02
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Your logic is wrong.
-michigan007-
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(2647 bytes)
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11/03/2011 postreply
09:53:05
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Please read the question carefully
-michigan007-
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(1376 bytes)
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11/02/2011 postreply
16:48:29
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Yes, I do read carefully.
-yddad-
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(420 bytes)
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11/02/2011 postreply
18:23:58
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You were confused again
-michigan007-
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(2074 bytes)
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11/03/2011 postreply
06:23:18
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