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崽崽師傅新蟲(chóng) (初入文壇)
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[求助]
超越函數(shù)求解析式 已有1人參與
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求大神幫忙解答這個(gè)超越函數(shù)a(x.^2)+bx-c(1+x)log(1+x)+d=0 a,b,c,d為參數(shù),想得到x關(guān)于a,b,c,d的表達(dá)式。用matlab無(wú)法解出,如果只能近似解的話(huà),采用什么方法,怎么解 |
榮譽(yù)版主 (文壇精英)
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專(zhuān)家經(jīng)驗(yàn): +518 |
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(1+x)log(1+x) 為乘對(duì)數(shù)函數(shù),在木蟲(chóng)論壇搜一下,老問(wèn)題了?山柚鷚iki百科w函數(shù)做級(jí)數(shù)展開(kāi),求近似解。 發(fā)自小木蟲(chóng)Android客戶(hù)端 |
鐵桿木蟲(chóng) (職業(yè)作家)
銀蟲(chóng) (小有名氣)
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公式是不是寫(xiě)錯(cuò)了,應(yīng)該是㏑(1+x)或者有個(gè)底數(shù)才對(duì)啊 發(fā)自小木蟲(chóng)Android客戶(hù)端 |
銀蟲(chóng) (小有名氣)
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這個(gè)不知道啊,我沒(méi)學(xué)好,不過(guò)你可以把ln(x+1)進(jìn)行變量分離,分解 發(fā)自小木蟲(chóng)Android客戶(hù)端 |
新蟲(chóng) (初入文壇)
榮譽(yù)版主 (文壇精英)
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專(zhuān)家經(jīng)驗(yàn): +518 |
榮譽(yù)版主 (文壇精英)
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專(zhuān)家經(jīng)驗(yàn): +518 |
新蟲(chóng) (初入文壇)
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Try the following: Use different phrasing or notations Enter whole words instead of abbreviations Avoid mixing mathematical and other notations Check your spelling Give your input in English Other tips for using Wolfram|Alpha: Wolfram|Alpha answers specific questions rather than explaining general topics Enter "2 cups of sugar", not "nutrition information" You can only get answers about objective facts Try "highest mountain", not "most beautiful painting" Only what is known is known to Wolfram|Alpha Ask "how many men in Mauritania", not "how many monsters in Loch Ness" Only public information is available Request "GDP of France", not "home phone of Michael Jordan" 我試了一下,解不出來(lái),就是上面的那個(gè)。您輸進(jìn)去之后能解出來(lái)嗎?表達(dá)式是多少呢? |
新蟲(chóng) (初入文壇)
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