• 2022-05-29
    曲线[img=68x23]1802e08bc1d2814.png[/img]在点[img=43x39]1802e08bca30072.png[/img]处的曲率为( )
    A: [img=9x18]1802e08bd267dc0.png[/img]
    B: [img=9x43]1802e08bda2a458.png[/img]
    C: [img=9x43]1802e08be224ee6.png[/img]
    D: [img=9x18]1802e08bea94ae8.png[/img]