• 2022-06-17
    偏导数[img=65x25]178697f1a745d3e.png[/img]表示曲面[img=73x21]178697f1ae56bb0.png[/img]被平面[img=41x24]178697f1b77fc63.png[/img]所截得的曲线[img=88x51]178697f1c43cdc6.png[/img]在点[img=25x24]178697f1cee6a1c.png[/img] [img=113x24]178697f1d76fb51.png[/img]处的切线对[img=13x15]178697f1e0f4d66.png[/img]轴的斜率。( )
    A: 对
    B: 错