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我求o下你地...你地幫o下我....(關於M&S)
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我有幾條二階導數唔識做.....試左好多次都做唔倒........希望M&S高手可以幫o下我......萬分感激.....!!!!!1.設y=t^1/2 - 1/t^1/2+1 (即係y等於t^1/2 -1 over t^1/2 +1)求當t=1,dy/dt及d^2y/dt^2的值2.一條曲線的方程為y^3-xy-1=0 (a)求dy/dx (b)求d^2y/dx^2 (c)求在點(2,-1)處d^2y/dx^2的值3.若y=[x+(x^2-1)^1/2]^2, 證明(x^2-1)d^2y/dx^2 + x(dy/dx)... 顯示更多 我有幾條二階導數唔識做.....試左好多次都做唔倒........希望M&S高手可以幫o下我......萬分感激.....!!!!! 1.設y=t^1/2 - 1/t^1/2+1 (即係y等於t^1/2 -1 over t^1/2 +1)求當t=1,dy/dt及d^2y/dt^2的值 2.一條曲線的方程為y^3-xy-1=0 (a)求dy/dx (b)求d^2y/dx^2 (c)求在點(2,-1)處d^2y/dx^2的值 3.若y=[x+(x^2-1)^1/2]^2, 證明(x^2-1)d^2y/dx^2 + x(dy/dx) -4y=0 麻煩o係解答ge時候列出步驟....等我可以明白點樣計.....多謝各位得力相助~~ P.S第1題條式其實係將t開方....所以寫左做t^1/2.....而-1係另外的....所以唔好誤會係t的1/2-1次方............
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圖片參考:http://imgcld.yimg.com/8/n/HA00408036/o/701009190204413873372290.jpg 圖片參考:http://imgcld.yimg.com/8/n/HA00408036/o/701009190204413873372291.jpg 圖片參考:http://imgcld.yimg.com/8/n/HA00408036/o/701009190204413873372302.jpg 圖片參考:http://imgcld.yimg.com/8/n/HA00408036/o/701009190204413873372303.jpg 圖片參考:http://imgcld.yimg.com/8/n/HA00408036/o/701009190204413873372314.jpg 圖片參考:http://imgcld.yimg.com/8/n/HA00408036/o/701009190204413873372315.jpg 希望幫到你! 有錯請指正! 有問題歡迎提出! 2010-09-20 18:13:03 補充: 如果看不到, 請看以下連結: http://i256.photobucket.com/albums/hh172/hkchelsea_united/20100920D_2.png http://i256.photobucket.com/albums/hh172/hkchelsea_united/20100920E_2.png http://i256.photobucket.com/albums/hh172/hkchelsea_united/20100920F.png 2010-09-20 18:13:10 補充: http://i256.photobucket.com/albums/hh172/hkchelsea_united/20100920G.png http://i256.photobucket.com/albums/hh172/hkchelsea_united/20100920H.png http://i256.photobucket.com/albums/hh172/hkchelsea_united/20100920I.png
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