本课配套习题挑战模式2/5
单选题
难度系数:
2.下列函数是二次函数的是( )
A: y=2x+1 |
B: y=-2x+1 |
C: y=x2+2 |
D: y= |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS6jOasoeWHveaVsOWumuS5ieWIpOaWrQ==
- 答案:Qw==
6Kej77yaQeOAgXk9MngrMe+8jOaYr+S4gOasoeWHveaVsO+8jOaVheatpOmAiemhuemUmeivr++8mzxicj5C44CBeT0tMngrMe+8jOaYr+S4gOasoeWHveaVsO+8jOaVheatpOmAiemhuemUmeivr++8mzxicj5D44CBeT14PHN1cD4yPC9zdXA+KzLmmK/kuozmrKHlh73mlbDvvIzmlYXmraTpgInpobnmraPnoa7vvJs8YnI+ROOAgXk9PGltZyB3aWR0aD00MCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wQi9FQy9yQkFDRkZQSXZFdWdjWlVVQUFBQm1sWXpRclUyMDMucG5nIj7mmK/kuIDmrKHlh73mlbDvvIzmlYXmraTpgInpobnplJnor68uIDxicj7mlYXpgInvvJpDLiA=
本课配套习题挑战模式3/5
单选题
难度系数:
3.已知函数:①y=3x-1;②y=3x2-1;③y=3x3+2x2;④y=2x2-2x+1,其中二次函数的个数为( )
A: 1 |
B: 2 |
C: 3 |
D: 4 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS6jOasoeWHveaVsOeahOWumuS5ie+8jOWHveaVsOW8j+S4uuaVtOW8j+S4lOiHquWPmOmHj+eahOacgOmrmOasoeaVsOS4ujLvvIzkuozmrKHpobnns7vmlbDkuI3kuLow77yM6YCQ5LiA5Yik5patLg==
- 答案:Qg==
6Kej77ya4pGgeT0zeC0x5Li65LiA5qyh5Ye95pWw77ybPGJyPuKRoXk9M3g8c3VwPjI8L3N1cD4tMeS4uuS6jOasoeWHveaVsO+8mzxicj7ikaJ5PTN4PHN1cD4zPC9zdXA+KzJ4PHN1cD4yPC9zdXA+6Ieq5Y+Y6YeP5qyh5pWw5Li6M++8jOS4jeaYr+S6jOasoeWHveaVsO+8mzxicj7ikaN5PTJ4PHN1cD4yPC9zdXA+LTJ4KzHkuLrkuozmrKHlh73mlbDvvJs8YnI+5pWF5piv5LqM5qyh5Ye95pWw55qE5pyJMuS4qi4gPGJyPuaVhemAie+8mkIuIA==
本课配套习题挑战模式4/5
单选题
难度系数:
4.若y=(m2-m)是二次函数,则m等于( )
A: -2 |
B: 2 |
C: 1 |
D: 1或-2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS6jOasoeWHveaVsOeahOWumuS5ie+8jOaMh+aVsOaYrzLvvIzkuozmrKHpobnns7vmlbDkuI3nrYnkuo4w5YiX5Ye65pa556iL5rGC6Kej5Y2z5Y+vLg==
- 答案:QQ==
6Kej77ya55Sx6aKY5oSP5b6X77yMbTxzdXA+Mjwvc3VwPittPTLkuJRtPHN1cD4yPC9zdXA+LW3iiaAw77yMPGJyPuino+W+l208c3ViPjE8L3N1Yj49Me+8jG08c3ViPjI8L3N1Yj49LTLkuJRt4omgMO+8jG3iiaAx77yMPGJyPuKItG09LTIuIDxicj7mlYXpgIlBLiA=
本课配套习题挑战模式5/5
单选题
难度系数:
5.如果y=(a-1)x2-ax+6是关于x的二次函数,则a的取值范围是( )
A: a≠0 |
B: a≠1 |
C: a≠1且a≠0 |
D: 无法确定 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS6jOasoeWHveaVsOeahOWumuS5ieadoeS7tuWIl+WHuuaWueeoi+axguino+WImeWPry4=
- 答案:Qg==
6Kej77ya5qC55o2u5LqM5qyh5Ye95pWw55qE5a6a5LmJ77yMYS0x4omgMO+8jOWNs2HiiaAxLiA8YnI+5pWF6YCJQi4g