挑战习题
1/5单选题
难度:

1.已知函数y=(k-3)x2+2x+1的图象与x轴有交点,则k的取值范围是(  )
A k<4
B k≤4
C k<4且k≠3
D k≤4且k≠3
提示1:
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正确答案:Qg==
PGRpdj7op6PvvJrikaDlvZNrLTPiiaAw5pe277yM77yIay0z77yJeDxzdXA+Mjwvc3VwPisyeCsxPTDvvIzilrM9YjxzdXA+Mjwvc3VwPi00YWM9MjItNO+8iGstM++8icOXMT0tNGsrMTbiiaUw77yMa+KJpDTvvJs8L2Rpdj48ZGl2PuKRoeW9k2stMz0w5pe277yMeT0yeCsx77yM5LiOWOi9tOacieS6pOeCuS4gPC9kaXY+PGRpdj5r55qE5Y+W5YC86IyD5Zu05piva+KJpDQ8L2Rpdj4=