函数<img src=https://huaweicloudobs.ahjxjy.cn/292B32EE4173AEA43E59847F36722497.png title=KV4~RZ3(T{JLLV4E{]U2RS8.png alt=KV4~RZ3(T{JLLV4E{]U2RS8.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/97101D433DC34877DECFFED2A8E8D14A.png title=O9QIIJOHZNELO8J}S(T}38B.png alt=O9QIIJOHZNELO8J}S(T}38B.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/5AF42ED7E8A3D72661425A590F1BB5A4.png title=F`IO)RBZ]ESS_@FQ6BX)_}R.png alt=F`IO)RBZ]ESS_@FQ6BX)_}R.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C13193FD9441232A1D543DA4C6E6432B.png title=LRP5_T%VVH]IF9}PIUFOD62.png alt=LRP5_T%VVH]IF9}PIUFOD62.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A14577E16BA2C6FACC961D1AAB56AFFE.png title=QF(8_79AUWPOY96GRA9ED{J.png alt=QF(8_79AUWPOY96GRA9ED{J.png/>