本课配套习题挑战模式1/5
单选题
难度系数:
1.一个长方形的面积为x2-2xy+x,长是x,则这个长方形的宽是( )
A: x-2y |
B: x+2y |
C: x-2y-1 |
D: x-2y+1 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeUsemVv+aWueW9oumdouenr+WFrOW8j+efpe+8jOaxgumVv+aWueW9oueahOWuve+8jOWImeeUsemdouenr+mZpOS7peWug+eahOmVv+WNs+W+ly4=
- 答案:RA==
6Kej77ya77yIeDxzdXA+Mjwvc3VwPi0yeHkreO+8icO3eDxicj49eDxzdXA+Mjwvc3VwPsO3eC0yeHnDt3greMO3eDxicj49eC0yeSsxLiA8YnI+5pWF6YCJ77yaRC4g
本课配套习题挑战模式2/5
单选题
难度系数:
2.今天数学课上,老师讲了单项式乘以多项式,放学后,小华回到家拿出课堂笔记,认真复习老师课上讲的内容,他突然发现一道题;-3xy•(4y-2x-1)=-12xy2+6x2y+__________,空格的地方被钢笔水弄污了,你认为横线上应填写( )
A: 3xy |
B: -3xy |
C: -1 |
D: 1 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOatpOmimOaYr+agueaNruS5mOazleWIhumFjeW+i+i/m+ihjOWNlemhueW8j+S5mOWkmumhueW8j+eahOi/kOeul++8jOWcqOi/kOeul+aXtuazqOaEj+espuWPt+mXrumimC4=
- 答案:QQ==
6Kej77yaLTN4eSYjODIyNjvvvIg0eS0yeC0x77yJPGJyPj0tM3h5JiM4MjI2OzR5K++8iC0zeHnvvIkmIzgyMjY777yILTJ477yJK++8iC0zeHnvvIkmIzgyMjY777yILTHvvIk8YnI+PS0xMnh5PHN1cD4yPC9zdXA+KzZ4PHN1cD4yPC9zdXA+eSszeHkuIDxicj7miYDku6XlupTloavlhpnvvJozeHkuIDxicj7mlYXpgInvvJpBLiA=
本课配套习题挑战模式3/5
单选题
难度系数:
3.计算(x2-3x+n)(x2+mx+8)的结果中不含x2和x3的项,则m,n的值为( )
A: m=3,n=1 |
B: m=0,n=0 |
C: m=-3,n=-9 |
D: m=-3,n=8 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOacrOmimOmcgOWFiOagueaNruWkmumhueW8j+S5mOWkmumhueW8j+eahOi/kOeul+azleWImei/m+ihjOiuoeeul++8jOWGjeagueaNruS4jeWQq3g8c3VwPjI8L3N1cD7lkox4PHN1cD4zPC9zdXA+55qE6aG577yM5Y2z5Y+v5rGC5Ye6562U5qGILg==
- 答案:QQ==
6Kej77ya77yIeDxzdXA+Mjwvc3VwPi0zeCtu77yJ77yIeDxzdXA+Mjwvc3VwPitteCs477yJPGJyPj14PHN1cD40PC9zdXA+K214PHN1cD4zPC9zdXA+Kzh4PHN1cD4yPC9zdXA+LTN4PHN1cD4zPC9zdXA+LTNteDxzdXA+Mjwvc3VwPi0yNHgrbng8c3VwPjI8L3N1cD4rbm14KzhuPGJyPj14PHN1cD40PC9zdXA+K++8iG0tM++8iXg8c3VwPjM8L3N1cD4r77yIOC0zbStu77yJeDxzdXA+Mjwvc3VwPi0yNHgrOG7vvIw8YnI+4oi15LiN5ZCreDxzdXA+Mjwvc3VwPuWSjHg8c3VwPjM8L3N1cD7nmoTpobnvvIw8YnI+4oi0bS0zPTDvvIw8YnI+4oi0bT0zLiA8YnI+4oi0OC0zbStuPTDvvIw8YnI+4oi0bj0xLiA8YnI+5pWF6YCJQS4g
本课配套习题挑战模式4/5
单选题
难度系数:
4.一条水渠的横断面为梯形,该梯形的上底为a米,下底比上底多2b米,高比上底少b米. 那么这个梯形的面积为( )平方米.
A: 2a2-2b2 |
B: a2-b2 |
C: 2a2-b2 |
D: a2-b2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNrumimOaEj+ihqOekuuWHuuS4i+W6leS4jumrmO+8jOWIqeeUqOair+W9oueahOmdouenr+WFrOW8j+axguWHuuWNs+WPry4=
- 答案:Qg==
6Kej77ya5qC55o2u6aKY5oSP5b6X77yaPGJyPjxpbWcgd2lkdGg9OCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GRi9GQi9yQkFDRkZOc01BX0RJSzByQUFBQkR1U21iMGc5NzUucG5nIj7vvIhhK2ErMmLvvInvvIhhLWLvvIk977yIYSti77yJ77yIYS1i77yJPWE8c3VwPjI8L3N1cD4tYjxzdXA+Mjwvc3VwPi4gPGJyPuaVhemAiUIuIA==
本课配套习题挑战模式5/5
单选题
难度系数:
5.一个长方体的长、宽、高分别是3x-4、2x-1和x,则它的体积是()
A: 6x3-5x2+4x |
B: 6x3-11x2+4x |
C: 6x3-4x2 |
D: 6x3-4x2 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNrumVv+aWueS9k+eahOS9k+enr+etieS6jumVv8OX5a69w5fpq5jvvIzorqHnrpfljbPlj6/lvpfliLDnu5Pmnpwu
- 答案:Qg==
6Kej77ya5qC55o2u6aKY5oSP5b6X77yaeO+8iDN4LTTvvInvvIgyeC0x77yJPXjvvIg2eDxzdXA+Mjwvc3VwPi0xMXgrNO+8iT02eDxzdXA+Mzwvc3VwPi0xMXg8c3VwPjI8L3N1cD4rNHguIDxicj7mlYXpgIlCLiA=