• 2022-07-26
    2、曲面[img=120x26]1803a1dffbb8877.png[/img] 在点[img=55x25]1803a1e016f68c2.png[/img]处的切平面方程为( )
    A: [img=114x22]1803a1e01ed5ea8.png[/img]
    B: [img=114x22]1803a1e027dc4e2.png[/img]
    C: [img=128x22]1803a1e02fe910d.png[/img]
    D: [img=114x22]1803a1e0388d73f.png[/img]