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solve x^x=10

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solve x^x=10 solve x^(1/x)=1/2 solve x^(1/x)=1.3 三條問題需要詳細列式 更新: 飛天魏國大將軍張遼: 係1.3=13/10 唔係1/3 更新 2: 我不會重複問 同類型的問題 第3條是有2個答案 第4條問題: solve x^x=4/5 更新 3: 除了Newton's method ,有無其他計法 我想要一個exact的答案 保留一些function eg 定積分表示,三角function,ln

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As follows: 圖片參考:http://i117.photobucket.com/albums/o61/billy_hywung/May07/Newton2.jpg 圖片參考:http://i117.photobucket.com/albums/o61/billy_hywung/May07/Newton3.jpg 圖片參考:http://i117.photobucket.com/albums/o61/billy_hywung/May07/Newton4.jpg 2007-05-06 01:27:46 補充: 真抱歉, 看錯了.補答第三題:Let h(x) = x^(1/x) - 1.3By Newton's method:Starting from x = 0.5, one of the root is 1.4710Starting from x = 8, another root is 7.8571All roots are corr. to 4 d.p.(Method is similar to Q2) 2007-05-06 01:31:08 補充: 第四條同樣係兩個 root:Let r(x) = x^x - 0.8r(x) = 0 的 root 再用 Newton's mehotd 求:Starting from x = 0.05, one of the root is 0.09465 (corr. to 4 sig. fig.)Starting from x = 1, another root is 0.7395 (corr. to 4 d.p.)Note: Derivative of r(x) = x^x(1 十 ln x)

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