曲线<img src=https://huaweicloudobs.ahjxjy.cn/770D2009117E3781925836C249777BAA.png title=M7}ECW(7OR5]JP{`O9T[CGA.png alt=M7}ECW(7OR5]JP{`O9T[CGA.png width=135 height=58 style=width: 135px; height: 58px;/>处的法线方程为( )
①
<img src=https://huaweicloudobs.ahjxjy.cn/2C5F816F43B9429685A71A4EC145B0B5.png title=(%_)MX[W~8]M01MP{8`7HCX.png alt=(%_)MX[W~8]M01MP{8`7HCX.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/4A57B745971DF167C17F84A72C04C54D.png title=)MK4YQ}EWJ~9VF{[7X5T(GP.png alt=)MK4YQ}EWJ~9VF{[7X5T(GP.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/A0DE72E47EED7B8D04C17C016442F8BF.png title=]N93TE@53}O9F7([NSZK0%Q.png alt=]N93TE@53}O9F7([NSZK0%Q.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/347F503AD47009D1BA8F97E54C0C61B4.png title=7BC}UV3RWGPX{`]`G})[B[6.png alt=7BC}UV3RWGPX{`]`G})[B[6.png/>