广义积分[图]，则计算后是下列中哪个结果（）？A. I=1B. I...

A . A B . B C . C D . D

A . I=1 B . I=-1 C . I=1／2 D . 此广义积分发散

A .https://assets.asklib.com/images/image2/2017051116003216440.png B .https://assets.asklib.com/images/image2/201705111600412240.png C .https://assets.asklib.com/images/image2/2017051116005363651.png D .https://assets.asklib.com/images/image2/201705111601045755.png

A、<img src="https://p.ananas.chaoxing.com/star3/origin/3942bd6f39135cab420204a97119ee81.png"> B、<img src="https://p.ananas.chaoxing.com/star3/origin/2913758887dd3d8224ebfdf1eac66945.png"> C、<img src="https://p.ananas.chaoxing.com/star3/origin/4a6ae8baf11467104d967e608306ba24.png"> D、<img src="https://p.ananas.chaoxing.com/star3/origin/b20f3667301b0492cb88033598283a82.png">

A .https://assets.asklib.com/psource/2015102916524112971.jpg B .https://assets.asklib.com/psource/2015102916530378081.jpg C .https://assets.asklib.com/psource/2015102916532976384.jpg D .https://assets.asklib.com/psource/2015102916534429085.jpg

A . 图A. B . 图B. C . 图C. D . 图D.

A .https://assets.asklib.com/psource/2015102916541368162.jpg B .https://assets.asklib.com/psource/2015102916542663696.jpg C .https://assets.asklib.com/psource/2015102916544195401.jpg D .https://assets.asklib.com/psource/2015102916545395159.jpg

广义积分，<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17928616/2016071617423385400.jpg' />等于：（）<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17928616/2016071617430065536.jpg' /> A．A B． B C． C D． D

已知广义积分<img src='https://img2.soutiyun.com/ask/2020-12-20/977344836478918.png' />收敛于1(k＞0),则k=(). <img src='https://img2.soutiyun.com/ask/2020-12-20/97734484769256.png' />

下列各公式中，计算结果为建设周期的是() A.项目全部投资/项目建成投产后年平均盈利额 B.项目计划总投资额/本年实际完成投资额 C.本年国民收入增长额/本年基本建设投资额 D.项目全部投资完成额/项目新增生产能力

<img src='https://img2.soutiyun.com/shangxueba/ask/18018001-18021000/18020749/2015080410181540116.gif' />则下列计算正确的是（）。 A．①=120000-50000-40000=30000 B． ①=150000-120000=30000 C． ②=80000+30000=110000 D． ②=270000-70000-90000=110000

设<img src='https://img2.soutiyun.com/shangxueba/ask/17850001-17853000/17850417/2015102711231299538.jpg' />，令u=arctan<img src='https://img2.soutiyun.com/shangxueba/ask/17850001-17853000/17850417/2015102711231333386.jpg' />，dv=dx，用分部积分计算，则I利用分部积分公式后是下列中哪个（）？<img src='https://img2.soutiyun.com/shangxueba/ask/17850001-17853000/17850417/2015102711232357404.jpg' /> A．A B． B C． C D． D

A．可以任意假设；B．可用幂次多项式表示，系数由边界条件确定； C．若未知精确解很难确定。

二次积分<img src='https://img2.soutiyun.com/shangxueba/ask/17676001-17679000/17676154/2015102917004746434.jpg' />交换积分次序后的二次积分是（）。 A．<img src='https://img2.soutiyun.com/shangxueba/ask/17676001-17679000/17676154/2015102917011683633.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/17676001-17679000/17676154/2015102917014467452.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/17676001-17679000/17676154/2015102917032793192.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/17676001-17679000/17676154/2015102917034437496.jpg' />

A．A.第1个 B．B.第2个 C．C.第3个 D．D.不知道

<img src='https://img2.soutiyun.com/ask/2020-08-19/9666965590397.png' /><img src='https://img2.soutiyun.com/ask/2020-08-19/966696565618076.png' /><img src='https://img2.soutiyun.com/ask/2020-08-19/966696572187452.png' /><img src='https://img2.soutiyun.com/ask/2020-08-19/966696579021843.png' />

<img src='https://img.soutiyun.com/ask/zq/20210712/994955666781681.png' />

定积分<img src='https://img2.soutiyun.com/shangxueba/ask/19002001-19005000/19004405/2015110315375898047.png' />等于：（） A．1 B． 2 C． 3 D． 4

与小挠度微分方程<img src='https://img2.soutiyun.com/ask/2020-05-19/958758929472391.png' />对应的坐标系有图a、b、c、d所示的四种形式。下列选项哪个是正确的()。 <img src='https://img2.soutiyun.com/ask/2020-05-19/958758949133429.png' /> A.图b和c B.图b和a C.图b和d D.图c和d

计算下列无界函数的反常积分(发散也是一种计算结果): <img src='https://img2.soutiyun.com/ask/2020-12-16/976980402679191.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-27/980593228129949.png' />