本课配套习题挑战模式1/5
单选题
难度系数:
1.
下列函数关系式中,是二次函数的是( )
A: y=x3-2x2-1 |
B: y=x2 |
C: |
D: y=x+1 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5qC55o2u5LqM5qyh5Ye95pWw55qE5a6a5LmJ5p2h5Lu25a+55Zub5Liq6YCJ6aG56L+b6KGM6YCQ5LiA5YiG5p6Q5Y2z5Y+v77yOPC9wPg==
- 答案:Qg==
PHA+6Kej77yaQeOAgeiHquWPmOmHj+eahOacgOmrmOasoeaVsOaYrzPvvIzplJnor6/vvJs8YnI+QuOAgeato+ehru+8m+WxnuS6juS6jOasoeWHveaVsOeahOS4gOiIrOW9ouW8j++8mzxicj5D44CB5Y6f5Ye95pWw5Y+v5YyW5Li677yaeT0yeDxzdXA+LTI8L3N1cD4tM++8jOiHquWPmOmHj+eahOacgOmrmOasoeaVsOaYry0y77yM6ZSZ6K+v77ybPGJyPkTjgIHoh6rlj5jph4/nmoTmnIDpq5jmrKHmlbDmmK8x77yM6ZSZ6K+v77yOPGJyPuaVhemAiULvvI48L3A+
本课配套习题挑战模式2/5
单选题
难度系数:
2.已知二次函数y=1-3x+5x2,则其二次项系数a,一次项系数b,常数项c分别是( )
A: a=1,b=-3,c=5 |
B: a=1,b=3,c=5 |
C: a=5,b=3,c=1 |
D: a=5,b=-3,c=1 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5LqM5qyh5Ye95pWw55qE5a6a5LmJ6L+b6KGM6Kej562U5Y2z5Y+v77yO
- 答案:RA==
6Kej77ya4oi15Ye95pWweT0xLTN4KzV4PHN1cD4yPC9zdXA+5piv5LqM5qyh5Ye95pWw77yMPGJyPuKItGE9Ne+8jGI9LTPvvIxjPTHvvI48YnI+5pWF6YCJRO+8jg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.已知函数y=(m2+m)x2+mx+4为二次函数,则m的取值范围是( )
A: m≠0 |
B: m≠-1 |
C: m≠0,且m≠-1 |
D: m=-1 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5b2i5aaC5Ye95pWweT1heDxzdXA+Mjwvc3VwPitieCtj77yIYeKJoDDvvInmmK/kuozmrKHlh73mlbDvvIzlj6/lvpfnrZTmoYjvvI4=
- 答案:Qw==
6Kej77ya55SxeT3vvIhtPHN1cD4yPC9zdXA+K23vvIl4PHN1cD4yPC9zdXA+K214KzTkuLrkuozmrKHlh73mlbDvvIzlvpc8YnI+bTxzdXA+Mjwvc3VwPitt4omgMO+8jOino+W+l23iiaAw77yMbeKJoC0x77yMPGJyPuaVhemAie+8mkPvvI4=
本课配套习题挑战模式4/5
单选题
难度系数:
4.下列函数关系中,可以看做二次函数y=ax2+bx+c模型的是( )
A: 在一定距离内,汽车行驶的速度与行驶的时间的关系 |
B: 我国人中自然增长率为1%,这样我国总人口数随年份变化的关系 |
C: 竖直向上发射的信号弹,从发射到落回地面,信号弹的高度与时间的关系(不计空气阻力) |
D: 圆的周长与半径之间的关系 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yip55So5LqM5qyh5Ye95pWw55qE5oSP5LmJ77ya5LiA6Iis5Zyw77yM5oqK5b2i5aaCPGI+eT1heDxzdXA+Mjwvc3VwPitieCtjPC9iPu+8iOWFtuS4rWHjgIFi44CBY+aYr+mVv+W4uOaVsO+8jGHiiaAw77yMYu+8jGPlj6/ku6XkuLow77yJ55qE5Ye95pWw5Y+r5YGa5LqM5qyh5Ye95pWw77yO6YCQ5LiA5YiG5p6Q6Kej562U5Y2z5Y+v77yO
- 答案:Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.若y=(m-2)xm2−m是关于x的二次函数,则常数m的值为( )
A: -1 |
B: 2 |
C: -2 |
D: -1或-2 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5LqM5qyh5Ye95pWw55qE5a6a5LmJ5YiX5Ye65LiN562J5byP5rGC6Kej5Y2z5Y+v
- 答案:QQ==
6Kej77ya55SxeT3vvIhtLTLvvIl4PHN1cD5tPC9zdXA+PHN1cD4yPC9zdXA+PHN1cD4mIzg3MjI7PC9zdXA+PHN1cD5tPC9zdXA+5piv5YWz5LqOeOeahOS6jOasoeWHveaVsO+8jOW+lzxicj48aW1nIHdpZHRoPTg1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzdGL0Q4L3JCQUNKbFZ4Ul9XQmdLbmlBQUFDcGxzVzJFRTIzNy5wbmciPu+8jOino+W+l209Mu+8iOS4jeespuWQiOmimOaEj+imgeiIjeWOu++8ie+8jG09LTHvvIw8YnI+5pWF6YCJ77yaQe+8jg==