318d2270-71be-11eb-a37e-e580c0970d9b作业答案16（252-264）（周洋鑫）考研资料.pdfVIP免费

2022全程班高分必刷800题答案解析新浪微博@考研数学周洋鑫12022年督学班高分必刷800题作业答案第四章定积分及其应用【252】解析：211ararctanctan1xdxxdxx22111111arctan411xxdxdxxxxxx2221111lnln1lnln14242xxxx2211111ln0lnln242142242xx.【253】解析：分子分母同乘以2xe220001111xxxxxxexedxdxxdeee00011111xxxxxxeedxdxeee0001ln1lnln11xxxxxedxxeeee01ln0lnln212xxee【254】解析：332300011111111xxdxdxdxxxxx20111110112221xx【255】解析：222111111lnln1121xdxdxxxxxxx2022全程班高分必刷800题答案解析新浪微博@考研数学周洋鑫222221111111lnln1ln0lnln2221222xxxx【256】解析：原式1112211113arctan2522184xxdxdxxx【257】解析：222200220111111221211xdxdxxxx【258】解析：122021xdxxx，令sinxt22202002sincos1cosarctancos1cos42sincosttdtdttttt【259】解析：2111dxxx，令secxt.201sectansectan2ttdttt.【260】解析：2172dxxx，令2xt则22xt2002122arctan333239ttdttt【261】解析：2222111211xxxxxxedxdxdeeeeeee111arctan244xeeeee.【262】解析：（A）2212dxxx发散（B）2222ln1lnlnln2xdxxdxxx发散2022全程班高分必刷800题答案解析新浪微博@考研数学周洋鑫3（C）22211lnlnlnlnlndxdxxxxx发散（D）2222xxxxxedxxdexeedx2223xxxee...