下列函数在指定区间上单调增加的是（ ）.

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1-2/image007.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1-2/image008.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1-2/image009.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1-2/image010.png" alt="" align="middle">