已知曲线y=在点p(1,4)处的切线与直线l平行且距离为,则直线l的方程为( )
A. 4x-y+9=0,或 4x-y+25=0 | B. 4x-y+9=0 |
C. 4x+y+9="0," 或 4x+y-25=0 | D. 4x+y-25=0 |
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已知曲线y=在点p(1,4)处的切线与直线l平行且距离为,则直线l的方程为( )
A. 4x-y+9=0,或 4x-y+25=0 | B. 4x-y+9=0 |
C. 4x+y+9="0," 或 4x+y-25=0 | D. 4x+y-25=0 |