中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.已知：关于x的一元二次方程x2-2（2m-3）x+4m2-14m+8=0，若12＜m＜40的整数，且方程有两个整数根，则m的值为（）.
| A: 16 |
| B: 18 |
| C: 24 |
| D: 36 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWIqeeUqOaxguagueWFrOW8j+axguWHunjnmoTlgLzvvIznlKjlkKtt55qE5Luj5pWw5byP6KGo56S6
- 提示2：IHg977yIMm0tM++8icKxPGltZyB3aWR0aD02MSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC80MC84Qy9yQkFDRkZQVl8xdkQwM2xxQUFBQ0R5WUlqSFE4MDIucG5nIj4=
- 提示3：IDxpbWcgd2lkdGg9NTAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvN0QvREUvckJBQ0UxUFZfMXZEbENtTUFBQUJzbW1kQUZrODM3LnBuZyI+5bqU5Li65a6M5YWo5bmz5pa55pWw
- 答案：Qw==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.若关于x的一元二次方程kx2+（3k+1）x+3=0的两个根均为整数，且k为正整数，则k的值为（ ）
| A: 1 |
| B: 2 |
| C: 3 |
| D: 4 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWFiOWIqeeUqOaxguagueWFrOW8j+axguWHuuS4pOaguXg8c3ViPjE8L3N1Yj49LTPvvIx4PHN1Yj4yPC9zdWI+PS08aW1nIHdpZHRoPTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNDAvOEMvckJBQ0ZGUFZfMkRTaDRnR0FBQUJOa1ZYRkNjNTIwLnBuZyI+
- 提示2：IOWPquimgTHooqtr5pW06Zmk77yM5bm25LiU5pyJa+KJpTHnmoTmlbTmlbDvvIzljbPlj6/lvpfliLBr55qE5YC8
- 答案：QQ==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.若m为正整数，且关于x的一元二次方程mx2-（3m-2）x+2m-2=0有两个不相等的整数根，则m=（ ）
| A: 1 |
| B: 2 |
| C: 3 |
| D: 4 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWIqeeUqOaxguagueWFrOW8j+axguWHuuWQq23nmoTmoLk=
- 提示2：IOagueS4uuaVtOaVsOaXtuaxgm3nmoTlgLw=
- 答案：QQ==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.已知△ABC的一条边BC的长为5，另两边AB、AC的长是关于x的一元二次方程x2-（2k+3）x+k2+3k+2=0的两个实数根，k为（ ）时，△ABC是以BC为斜边的直角三角形；
| A: -5 |
| B: 2 |
| C: 2或-5 |
| D: 4 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOiLpeKWs0FCQ+aYr+S7pUJD5Li65pac6L6555qE55u06KeS5LiJ6KeS5b2i77yM5YiZ5qC55o2u5Yu+6IKh5a6a55CG77yMQUI8c3VwPjI8L3N1cD4rQUM8c3VwPjI8L3N1cD49MjXvvIzlho3moLnmja7moLnkuI7ns7vmlbDnmoTlhbPns7vmsYLlvpdr55qE5YC85Y2z5Y+v
- 答案：Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.已知关于x的一元二次方程x2+（m+3）x+m+1=0. 当整数m为（）时，原方程的根也是整数
| A: -1 |
| B: -1，-2 |
| C: -2 |
| D: -2，-3 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWIqeeUqOaxguagueWFrOW8j+ihqOekuuWHuuinow==
- 提示2：IOimgeS9v+WOn+aWueeoi+eahOagueaYr+aVtOaVsO+8jOW/hemhu+S9v+W+l++8iG0rMe+8iTxzdXA+Mjwvc3VwPis05piv5a6M5YWo5bmz5pa55pWw
- 提示3：IOiuvu+8iG0rMe+8iTxzdXA+Mjwvc3VwPis0PWE8c3VwPjI8L3N1cD7vvIzlj5jlvaLlvpfvvJrvvIhhK20rMe+8ie+8iGEtbS0x77yJPTTvvIznlLFhK20rMeWSjGEtbS0x55qE5aWH5YG25oCn55u45ZCM77yM5YiX5Ye65pa556iL57uE77yM5rGC5Ye65pa556iL57uE55qE6Kej5b6X5YiwYeS4jm3nmoTlgLzvvIzku6PlhaXop6PkuK3mo4DpqozljbPlj6/lvpfliLDmu6HotrPpopjmhI9t55qE5YC8Lg==
- 答案：QQ==
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
