本课配套习题挑战模式1/5
单选题
难度系数:
1.方程(x-2)(x+3)=0的解是( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOaWueeoi+WIqeeUqOS4pOaVsOebuOS5mOenr+S4ujDvvIw=
- 提示2:IOS4pOWboOW8j+S4reiHs+WwkeacieS4gOS4quS4ujDovazljJbkuLrkuKTkuKrkuIDlhYPkuIDmrKHmlrnnqIvmnaXmsYLop6M=
- 提示3:IOino+S4gOWFg+S6jOasoeaWueeoiy3lm6DlvI/liIbop6Pms5U=
- 答案:RA==
PGRpdj7op6PvvJrvvIh4LTLvvInvvIh4KzPvvIk9MO+8jDxicj7lj6/lvpd4LTI9MOaIlngrMz0w77yMPGJyPuino+W+l++8mng8c3ViPjE8L3N1Yj49Mu+8jHg8c3ViPjI8L3N1Yj49LTMuIDxicj7mlYXnrZTmoYjkuLrvvJp4PHN1Yj4xPC9zdWI+PTLvvIx4PHN1Yj4yPC9zdWI+PS0zPC9kaXY+
本课配套习题挑战模式2/5
单选题
难度系数:
2.方程(x+1)(x-2)=x+1的解是( )
A: 2 |
B: 3 |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWFiOenu+mhueW+l+WIsO+8iHgrMe+8ie+8iHgtMu+8iS3vvIh4KzHvvIk9MA==
- 提示2:IOeUqOaPkOWFrOWboOW8j+WboOW8j+WIhuinow==
- 提示3:IOWMluS4uuS4pOS4quS4gOWFg+S4gOasoeaWueeoi++8jOino+aWueeoi+WNs+WPrw==
- 答案:RA==
PGRpdj7op6PvvJrvvIh4KzHvvInvvIh4LTLvvIkt77yIeCsx77yJPTDvvIw8YnI+4oi077yIeCsx77yJ77yIeC0yLTHvvIk9MO+8jOWNs++8iHgrMe+8ie+8iHgtM++8iT0w77yMPGJyPuKItHgrMT0w77yM5oiWeC0zPTDvvIw8YnI+4oi0eDxzdWI+MTwvc3ViPj0tMe+8jHg8c3ViPjI8L3N1Yj49My4gPGJyPuaVhemAiUQuIDwvZGl2Pg==
本课配套习题挑战模式3/5
单选题
难度系数:
3.一元二次方程x2+3x-4=0的解是( )
A: x1=1,x2= |
B: x1=,x2=4 |
C: x1=,x2= |
D: x1=1,x2=4 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWboOW8j+WIhuino+azleino+aWueeoiw==
- 提示2:IOWNgeWtl+ebuOS5mOazlQ==
- 答案:QQ==
PGRpdj7op6PvvJp4PHN1cD4yPC9zdXA+KzN4LTQ9MDxicj7vvIh4LTHvvInvvIh4KzTvvIk9MDxicj7op6PlvpfvvJp4PHN1Yj4xPC9zdWI+PTHvvIx4PHN1Yj4yPC9zdWI+PS0077ybPGJyPuaVhemAiUEuIDwvZGl2Pg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.已知关于x的方程x2-ax+b=0的两个根是x1=-1,x2=2,则二次三项式x2-ax+b可以分解为( )
A: (x+1)(x+2) |
B: (x+1)(x-2) |
C: (x-1)(x+2) |
D: (x-1)(x-2) |
一次做对,真牛!
+5奖励规则>
- 提示1:IOi/kOeUqOWboOW8j+WIhuino+azleWPjeWQkeaxguaWueeoi+eahOWIhuino+W8jw==
- 答案:Qg==
PGRpdj7op6PvvJriiLV4PHN1Yj4xPC9zdWI+PS0x77yMeDxzdWI+Mjwvc3ViPj0y77yMPGJyPuKItOWOn+aWueeoi+S4uu+8mu+8iHgrMe+8ie+8iHgtMu+8iT0wLiA8YnI+5pWF6YCJQi4gPC9kaXY+
本课配套习题挑战模式5/5
单选题
难度系数:
5.三角形两边长分别为3和6,第三边是方程x2-6x+8=0的解,则这个三角形的周长是( )
A: 11 |
B: 13 |
C: 11或13 |
D: 不能确定 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeUqOWboOW8j+WIhuino+axguWHuuaWueeoi+eahOS4pOS4quaguQ==
- 提示2:IOagueaNruS4ieinkuW9ouS4iei+ueeahOWFs+ezu+ehruWumuS4ieinkuW9ouesrOS4iei+ueeahOmVvw==
- 提示3:IOiuoeeul+WHuuS4ieinkuW9oueahOWRqOmVvw==
- 答案:Qg==
PGRpdj7op6PvvJrvvIh4LTLvvInvvIh4LTTvvIk9MDxicj54LTI9MOaIlngtND0wPGJyPuKItHg8c3ViPjE8L3N1Yj49Mu+8jHg8c3ViPjI8L3N1Yj49NC4gPGJyPuWboOS4uuS4ieinkuW9ouS4pOi+ueeahOmVv+WIhuWIq+S4ujPlkow277yM5omA5Lul56ys5LiJ6L6555qE6ZW/5Li6NO+8jDxicj7lkajplb89Mys2KzQ9MTMuIDxicj7mlYXpgIlCLiA8L2Rpdj4=