高等數(shù)學(xué)11-5-經(jīng)營管理-展示頁
2025-05-21 20:22本頁面
【正文】 1nnv 絕對收斂 , 稱復(fù)數(shù)項級數(shù)絕對收斂 .復(fù)數(shù)項級數(shù)絕對收斂的概念 三個基本展開式 ,!!212?? ?????? nxxxenx,)!12()1(!5!3s in12153?? ??????????nxxxxx nn,)!2()1(!4!21c o s242?? ??????? nxxxxnn)( ?????? x)( ?????? x)( ?????? x的冪級數(shù)展開式由 xe?? ?????? nix ixnixixe )(!1)(!211 2))!12()1(!31())!2()1(!211(12322??????????????????nxxxinxxnnnn.s i nc os xix ??xcosxsinxixe ix s i nco s ?????????????????ieexeexixixixix2s in2c o sxixe ix s i nc o s ????又 揭示了三角函數(shù)和復(fù)變量指數(shù)函
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