1.单选题- (共8题)
的解是（ ）A． x（x﹣1）=2970  | B．x（x﹣1）=2970 | C．x（x+1）=2970 | D．x（x+1）=2970 |
B. k≥4| A．（x-3）（x-5）=10×2，∴x-3=10，x-5=2，∴x1=13，x2=7 |
B．（2-5x）+（5x-2）2=0，∴（5x-2）（5x-3）=0，∴x1= ，x2= |
| C．（x+2）2+4x=0，∴x1=2，x2=-2 |
| D．x2=x 两边同除以x，得x=1 |
的解是（ ）
2.选择题- (共2题)
In China, there're many different kinds of food. Some of them are very popular. The real Chinese food is dumplings. Now let's talk about them, OK?
Everyone in China likes dumplings very much, and there are many different kinds of dumplings. Some have meat and vegetables in them, others have sugar, eggs and so on. I like dumplings with vegetables and pork better than any other kind.
Usually people make dumplings at home. If you have no time to make them, you can buy them from any supermarket. Then you take them home and eat them with vinegar.
The Spring Festival is very important in China. When it comes, we make dumplings, usually we put a coin(硬币) in a dumpling. If one eats the dumpling with the coin in it, he or she will be lucky in the year.
In the old days, people couldn't often eat dumplings, because they were very poor. Now our country is becoming stronger and stronger, and our people are richer and richer. We can eat them very often.
Now tell me, do you like dumplings?
Welcome to China, and we'll invite you to eat the real Chinese food —dumplings.
3.填空题- (共8题)
的一元二次方程
的两个不等实数根分别为
，且
，则
的值为_____________.
，
满足
，
，则
________．
，则依题意列方程为_____________________________________。
与x轴没有交点，则m的取值范围是______．
的一元二次方程x2+2x-k=0没有实数根，则k的取值范围是
，
是关于x的一元二次方程x2+（2m+3）x+m2=0的两个不相等的实数根，且满足
=﹣1，则m的值是____．4.解答题- (共5题)
是关于x的一元二次方程
的两个不相等的实数根，且满足
，求m的值.-
【1】题量占比
单选题:(8道)
选择题:(2道)
填空题:(8道)
解答题:(5道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：1
5星难题：0
6星难题：6
7星难题：0
8星难题：10
9星难题：4