<img src=https://huaweicloudobs.ahjxjy.cn/D89E9281D26F96D90D87321764708ABA.png style=vertical-align: middle;/>时,下列变量中与<img src=https://huaweicloudobs.ahjxjy.cn/9B278156D9FC876F8ECA8CDC54493CAD.png style=vertical-align: middle;/>为等价无穷小量的是
①
<img src=https://huaweicloudobs.ahjxjy.cn/402FFA80629B3A133B49359733C5A52A.png style=vertical-align: middle;/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/46931E578B7570E0E994B9E40C3B979E.png style=vertical-align: middle;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/7D52CA9BBB7F54884728FDDA80CB0A80.png style=vertical-align: middle;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/BEC52267B31B717734797BA05F64B7C3.png style=vertical-align: middle;/>