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integration~

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as follows~~~ 圖片參考:http://i256.photobucket.com/albums/hh182/zilu_photo/sshot-2010-02-20-00-48-42.png 更新: (1) integrate[from 0 to a] f dx (2) integrate[from 0 to a] (f*t) dx (3) integrate[from 0 to a] (f*t^2) dx f is a function of x

最佳解答:

你d t 係唔係打錯呀 2010-02-21 00:27:40 補充: 如果係錦 ..... t 已經變成一個constant , 基本上 2 ,3 式都係由 1 式 變出來的. ... i.e. 係 In (0,a) f(x) dx consider F(a)=0 and F(0) =0 ( F'(x)=f(x) ) => F(x) = x(x-a) =>f(x)=2x-a so f(x) =2x-a

其他解答:

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one more trivial soln is the constant function f(x)=0
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