下列不定积分中，常用分部积分法计算的是（　）．

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image155.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image156.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image157.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image158.png" alt="" align="middle">