• 2022-06-19
    当[img=21x25]1803403d295a9c6.png[/img]很小时([img=42x19]1803403d32443ab.png[/img]),用微分近似计算公式[img=108x26]1803403d3b11a6b.png[/img]
    A: [img=11x39]1803403d436280b.png[/img]
    B: [img=21x45]1803403d4b28908.png[/img]
    C: [img=11x14]1803403d52fe07b.png[/img]
    D: [img=21x25]1803403d5b7e856.png[/img]
  • 举一反三