与直线 平行的抛物线
平行的抛物线 的切线方程是
的切线方程是
       A.2x y+3=0                                              B.2x
y+3=0                                              B.2x y
y 3=0
3=0
            C.2x y+1=0                                                D.2x
y+1=0                                                D.2x y
y 1=0
1=0
与直线 平行的抛物线
平行的抛物线 的切线方程是
的切线方程是
       A.2x y+3=0                                              B.2x
y+3=0                                              B.2x y
y 3=0
3=0
            C.2x y+1=0                                                D.2x
y+1=0                                                D.2x y
y 1=0
1=0
D