• 2022-07-02
    二次曲线通过点(0,1)的切线方程是()
    A: y=1或x-y-1=0
    B: y=1或x-y+1=0
    C: x-2y=1或x+y-1=0
    D: x+2y=1或x+y-1=0
  • 举一反三