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送交者: BOQ 于 2007-04-13, 11:13:02:
a+x=b*lnx
a,b为已知数,x是未知数,ln是自然对数。
应该如何解?
我模糊记得十几年前学高数时学过一个作图法看相交来解的。
有没有常规的解法?
谢谢!
所有跟贴:
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Zee
(189 bytes)
2007-04-14, 02:00:25
(135520)
方程的解是
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Amsel
(65 bytes)
2007-04-14, 01:06:25
(135517)
let me try
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persiasprince
(361 bytes)
2007-04-13, 17:19:15
(135457)
What if b < 0 (无内容)
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fuzzify
(0 bytes)
2007-04-13, 22:23:04
(135487)
Hmm, good point (无内容)
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persiasprince
(0 bytes)
2007-04-13, 22:37:22
(135500)
两边求导,一下子就得出 x = b
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xinku
(16 bytes)
2007-04-13, 17:02:34
(135455)
[三类数学毕业吧?] that'll certainly damage your reputation.
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008
(64 bytes)
2007-04-13, 17:48:39
(135459)
I already apologized (无内容)
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xinku
(0 bytes)
2007-04-13, 17:49:46
(135460)
Did you? Should we say you finally understand, instead of "misunderstanding"
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008
(228 bytes)
2007-04-13, 18:37:44
(135464)
I apologized because I gave the wrong answer
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xinku
(171 bytes)
2007-04-13, 19:41:35
(135469)
求导? B 大 CS 的 数学? (无内容)
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lars
(0 bytes)
2007-04-13, 17:11:05
(135456)
sorry. misunderstanding........... (无内容)
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xinku
(0 bytes)
2007-04-13, 17:31:59
(135458)
x = f(x) = bln(x) - a? (无内容)
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Nixrreg
(0 bytes)
2007-04-13, 15:50:36
(135442)
Draw y = a + x, then y = b*log(x) (无内容)
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Nixrreg
(0 bytes)
2007-04-13, 16:02:28
(135443)
Are you a high school kid? (无内容)
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steven
(0 bytes)
2007-04-13, 16:13:00
(135444)
他是研究马克思主义政治经济学的 (无内容)
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你太有才了
(0 bytes)
2007-04-13, 16:22:07
(135447)
makes me wonder, since the originator asked method other
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steven
(19 bytes)
2007-04-13, 16:42:10
(135452)
why don't you give a and b we can post the solution right here
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008
(52 bytes)
2007-04-13, 12:13:01
(135427)
numerical solution
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wavelet
(84 bytes)
2007-04-13, 12:04:42
(135425)
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