下列各组函数中是相同的函数有（）。<br>·<img src="/lqwvjeImg/bd/bd61479800c456f2045733617cde1f54.png" style="white-space: normal; box-sizing: border-box; border: 0px; vertical-align: middle;"><br>·<img src="/lqwvjeImg/85/85d9b4ba651181ecf1f5486225afbaf8.png" style="white-space: normal; box-sizing: border-box; border: 0px; vertical-align: middle;"><br>·<img src="/lqwvjeImg/51/51debf991a05736d5f1a7af1d306dd1e.png" style="white-space: normal; box-sizing: border-box; border: 0px; vertical-align: middle;"><br>·<img src="/lqwvjeImg/51/512070bab399b21ee287d3d8c066a017.png" style="white-space: normal; box-sizing: border-box; border: 0px; vertical-align: middle;">