• 2022-07-26
    2、曲面[img=120x26]18036ecb47625ed.png[/img] 在点[img=55x25]18036ecb4fda784.png[/img]处的切平面方程为( )
    A: [img=114x22]18036ecb58cc5db.png[/img]
    B: [img=114x22]18036ecb613b898.png[/img]
    C: [img=128x22]18036ecb69a26c0.png[/img]
    D: [img=114x22]18036ecb72dc251.png[/img]