本课配套习题挑战模式1/5
A: k<4 |
B: k≤4 |
C: k<4且k≠3 |
D: k≤4且k≠3 |
- 提示1:DQprLTPnmoTnrKblj7fpnIDopoHorqjorro=
- 答案:Qg==
PGRpdj7op6PvvJrikaDlvZNrLTPiiaAw5pe277yM77yIay0z77yJeDxzdXA+Mjwvc3VwPisyeCsxPTDvvIzilrM9YjxzdXA+Mjwvc3VwPi00YWM9MjItNO+8iGstM++8icOXMT0tNGsrMTbiiaUw77yMa+KJpDTvvJs8L2Rpdj48ZGl2PuKRoeW9k2stMz0w5pe277yMeT0yeCsx77yM5LiOWOi9tOacieS6pOeCuS4gPC9kaXY+PGRpdj5r55qE5Y+W5YC86IyD5Zu05piva+KJpDQ8L2Rpdj4=
本课配套习题挑战模式2/5
A: y=-x2+2x-5 |
B: y=-2x2-8x-11 |
C: y=3x2-6x+1 |
D: y=4x2+24 |
- 提示1:IOS7pHk9MO+8jOWIqeeUqOKWs+eahOespuWPt+ehruWumuS6pOeCueS4quaVsA==
- 答案:Qw==
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
本课配套习题挑战模式3/5
已知函数y=ax2+bx+c的图象如图所示,那么关于x的方程ax2+bx+c+2=0的根的情况是( )
A: 无实数根 |
B: 有两个相等实数根 |
C: 有两个异号实数根 |
D: 有两个同号不等实数根 |
- 提示1:PHA+5pa55rOV5LiA77yaIOS7pHk8c3ViPjE8L3N1Yj49IGF4PHN1cD4yPC9zdXA+K2J4K2MrMu+8jOiAg+iZkeWHveaVsOWbvuWDj+eahOW5s+enu+ehruWumuS6pOeCueS4quaVsDwvcD4=
- 提示2:PHA+5pa55rOV5LqM77ya5Y+v5Lul56e76aG55oiQYXg8c3VwPjI8L3N1cD4rYngrYz0tMu+8jOWwhnk9LTLnnIvmiJDlh73mlbDvvIzpgJrov4flm77lg4/ogIPomZHkuqTngrk8L3A+
- 答案:RA==
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
本课配套习题挑战模式4/5
A: (2,-5),(3,-4) |
B: (1,-6),(2,-5) |
C: (-1,-8),(3,-4) |
D: (6,-1),(1,-6) |
- 提示1:IOiBlOeri+aWueeoi+ino+S4gOWFg+S6jOasoeaWueeoiw==
- 答案:Qg==
PGRpdj7op6PvvJrku6QmIzExOTkwOTs8c3VwPjI8L3N1cD7vvI0yJiMxMTk5MDk777yNNe+8nSYjMTE5OTA5Oy03PC9kaXY+PGRpdj7mlbTnkIblvpcgKHgtMSkoeCsyKT0w77yM6Kej5b6XeDxzdWI+MTwvc3ViPj0xLHg8c3ViPjI8L3N1Yj49LTI8L2Rpdj48ZGl2PuS7o+WFpeW+l+S6pOeCueWdkOagh+S4uu+8iDHvvIwtNu+8ie+8jO+8iDLvvIwtNe+8iTwvZGl2Pg==
本课配套习题挑战模式5/5
已知一元二次方程x2+kx-2=0的一个根为1,则函数y=x2+kx-2与x轴的交点坐标为( )
A: (1,0)和(2,0) |
B: (1,0)和(-2,0) |
C: (-1,0)和(2,0) |
D: (-1,0)和(-2,0) |
- 提示1:PHA+5Yip55So6Z+m6L6+5a6a55CG56Gu5a6a5Y+m5aSW5LiA5Liq5qC5PC9wPg==
- 答案:Qg==
PGRpdj7op6PvvJrorr7kuIDlhYPkuozmrKHmlrnnqIt4PHN1cD4yPC9zdXA+K2t4LTI9MOeahOWPpuS4gOS4quagueS4umHvvIw8L2Rpdj48ZGl2PuKIteS4gOWFg+S6jOasoeaWueeoi3g8c3VwPjI8L3N1cD4ra3gtMj0w55qE5LiA5Liq5qC55Li6Me+8jDwvZGl2PjxkaXY+4oi0YeKAojE9LTLvvIw8L2Rpdj48ZGl2PuKItGE9LTLvvIzljbPkuIDlhYPkuozmrKHmlrnnqIt4PHN1cD4yPC9zdXA+K2t4LTI9MOeahOS4pOagueWIhuWIq+S4uu+8mjHvvIwtMu+8jDwvZGl2PjxkaXY+4oi05Ye95pWweT14PHN1cD4yPC9zdXA+K2t4LTLkuI546L2055qE5Lqk54K55Z2Q5qCH5Li677yIMe+8jDDvvInlkozvvIgtMu+8jDDvvIkuPC9kaXY+