问题详情

用第一换元法求定积分,则下列步骤中正确的是( ).


<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image071.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image072.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image073.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image074.png" alt="" align="middle">

时间:2021-07-17 19:19 关键词:

答案解析

<img src="http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/2-3/image073.png" alt="" align="middle">