定積分習(xí)題課-資料下載頁
2025-07-18 21:56本頁面
【正文】 ??? 40 2s inln xdxI ??? 40 )c o ss in2ln ( dxxx????? 40 )c o slns inln2( ln dxxx????????? 2440s i nlns i nln2ln4 xdxxdx????? 20s inln2ln4 x d xI22ln4 ???.2ln4???? I例 5 .])1(ln1s i n[212128?? ??? dxxxx求解 dxx????? 2121 )1l n (0原式dxxdxx ?? ?????210021 )1l n ()1l n (.21ln23ln23 ??例 6 .},1m i n {222??dxxx求解 ????????1,11,},1m i n{22xxxxxx?是偶函數(shù) , dxxx },1m in {2 220??原式?? ?? 2110 2 122 dxxdxx .2ln232 ??例 7 .)()1(,)( 10 20 22 ?? ?? ?? dxxfxdyexf x yy 求設(shè)解 ? ? ???? 10 022 ][)1( 2 dxdyex x yy原式?? ???? ???? 10 23100 23 22 )1(31])1(31[ dxexdyex xxx yy? ???? ???10 21)1(2 ])1[()1(61 2 xdex xux ?? 2)1(令 ? ?? 016 duuee u ).2(61 ??? e
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