用定积分换元法计算下面定积分：[br][/br][tex=8.214x2.429]Wtk0f0VUi9Y4xEAeVMwAC6HCrRSFT/rlsgzqVnhYyyuBRWd6hZr/o9MQUWsu6NTA3MzGI4Lpyu+ixM0bY5DVIQ==[/tex]；
举一反三
- 用定积分换元法计算下列定积分：[br][/br][tex=6.857x2.429]/gTipYodITWi1ZaplQ4Cs0NkNWRyvRyZmbKT01kT+4RkLEsFeWd71Wz+tOyz1OyA[/tex]；
- 用定积分换元法计算下列定积分：[br][/br][tex=6.929x2.571]qa+jvGRasaffBYPL4r9nw1YLmqwN/29gmkRfK6GqqvMNgkkqKqm+2xeBpxdG8Faw[/tex]；
- 用定积分换元法计算定积分[tex=6.071x2.5]quyKetznrNxdaNQjt8Trhw1co8Sd9bymvPtFEIPCdCUMh52alwxNl1mL1xu9Mu03[/tex]。
- 用定积分的换元法计算积分：[tex=4.786x2.857]vZDOHPPFbaKHfV4LXE21tslasRz3ZDwf9TCefe5zB2tany1fX/BT22NalZGqAJAV[/tex]
- 用定积分的换元法计算积分：[tex=6.071x2.786]tkvB/yDwaVhsElN27LV5tzID2QVOPB5oaZ9yC7sK5ziNPY5q+WWiK7IgjibxXmNg[/tex]