来自陆海斌的问题
与直线2x-y+4=0的平行的抛物线y=x2的切线方程是()A.2x-y+3=0B.2x-y-3=0C.2x-y+1=0D.2x-y-1=0
与直线2x-y+4=0的平行的抛物线y=x2的切线方程是()
A.2x-y+3=0
B.2x-y-3=0
C.2x-y+1=0
D.2x-y-1=0
1回答
2020-06-30 22:43
与直线2x-y+4=0的平行的抛物线y=x2的切线方程是()A.2x-y+3=0B.2x-y-3=0C.2x-y+1=0D.2x-y-1=0
与直线2x-y+4=0的平行的抛物线y=x2的切线方程是()
A.2x-y+3=0
B.2x-y-3=0
C.2x-y+1=0
D.2x-y-1=0
由题意可设切线方程为2x-y+m=0
联立方程组
2x−y+m=0y=x