• 2022-06-30
    设[img=140x26]1803d363961a698.png[/img]为可导函数且[img=70x25]1803d3639f82e2f.png[/img],又[img=143x27]1803d363a81674f.png[/img]则f(x)=( )
    A: - 2x + 1
    B: [img=63x24]1803d363b15a666.png[/img]
    C: - 2x - 1
    D: [img=63x24]1803d363b93f706.png[/img]
  • 举一反三