X^2 = 2^x

👨🏻‍🏫 學術台數學

2008-03-16 5:37 pm

X^2 = 2^x
how to solve for x? no guessing and calculators

And a^x = x^a ? for a is constant

回答 (3)

2008-03-25 10:11 pm

✔ 最佳答案

圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/crazyequation/crazyequation.jpg

By using MATLAB and according to http://en.wikipedia.org/wiki/Lambert%27s_W_function

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參考: MATLAB + http://en.wikipedia.org/wiki/Lambert%27s_W_function + my maths knowledge

👍 0 👎 0

2008-03-17 2:27 am

明顯 x = a 就是答案。

👍 0 👎 0

2008-03-16 7:23 pm

X^2 = 2^x
2logX=xlog2
2/log2=x/logX

so x=2

參考: 自己

👍 0 👎 0

收錄日期: 2021-04-23 17:47:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080316000051KK00577

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