• 2022-06-05
    曲线[img=39x20]17e0a6a53db23e7.jpg[/img]在x=1处的切线方程是()
    A: 2x-y+1=0
    B: 2x+y-1=0
    C: 2x-y-1=0
    D: 2x+y+1=0
  • 举一反三