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.
分解因式3x2+5xy-2y2+x+9y-4＝（ ）
| A: (3x+y+4)(x+2y-1) |
| B: (3x-y+4)(x+2y-1) |
| C: (3x-y-4)(x+2y-1) |
| D: (3x-y+4)(x-2y-1) |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5q2k6aKY5om+5LiN5Yiw5YWs5Zug5byP5omA5Lul55So5b6F5a6a57O75pWw5rOVPC9wPg==
- 提示2：PHA+6KeC5a+fM3g8c3VwPjI8L3N1cD4rNXh5LTJ5PHN1cD4yPC9zdXA+PSgzeC15KSh4KzJ5KTwvcD4=
- 提示3：PHA+5Y+v6K6+M3g8c3VwPjI8L3N1cD4rNXh5LTJ5PHN1cD4yPC9zdXA+K3grOXktND0oM3gteSthKSh4KzJ5K2Ip5a+55bqU57O75pWw5Y2z5Y+v5rGC55qE44CCPC9wPg==
- 答案：Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.如果
能分解成两个整数系数的二次因式的积，试求m的值( )
能分解成两个整数系数的二次因式的积，试求m的值( ) | A: 1 |
| B: 2 |
| C: 3 |
| D: 4 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOaLhuWIhuaKijxpbWcgd2lkdGg9MjAgaGVpZ2h0PTIyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvQUQvckJBQ0UxTU1kTk9SSno2UEFBQUJQbjFXQUpzMDc0LnBuZyI+5YiG5oiQPGltZyB3aWR0aD00NCBoZWlnaHQ9MjIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC9CRS9yQkFDRkZNTWROYmpleWFCQUFBQml5NW9vSHcyODcucG5nIj7vvIzogIzlr7nkuo7luLjmlbDpobktMu+8jOWPr+iDveWIhuino+aIkDxpbWcgd2lkdGg9NTQgaGVpZ2h0PTI2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvQkUvckJBQ0ZGTU1kTm5BRW0tZEFBQUNCbHVlMk9JNzQ4LnBuZyI+77yM5oiW6ICF5YiG6Kej5oiQPGltZyB3aWR0aD01MiBoZWlnaHQ9MjYgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC9CRS9yQkFDRkZNTWROdWp5UGNxQUFBQ0REUV8zZU01NjEucG5nIj7ml6Dorrrlk6rnp43nu5PmnpzmmK/kuIDmoLfnmoTjgII=
- 提示2：IOWOn+W8j+WIhuino+S4ujxpbWcgd2lkdGg9MTU4IGhlaWdodD0zMiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAwL0JFL3JCQUNGRk1NZE43UlR0ZXRBQUFEOUdHdWxvUTg3Mi5wbmciPg==
- 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.
已知三次方程x3-6x2+11x-6=0,有一根是另一根的2倍,则：x1,x2,x3分别为（）
| A: 2，3，4 |
| B: 1，3，4 |
| C: 1，2，3 |
| D: 1，2，4 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5b+F6aG75YWI5bCG5LiJ5Liq5qC56KGo56S65Ye65p2lPC9wPg==
- 提示2：PHA+5LiA5Liq5LiJ5qyh5aSa6aG55byP5qC55Li6Ye+8jGLvvIxj6YKj5LmI77yIeC1h77yJ77yIeC1i77yJ77yIeC1j77yJPTA8L3A+
- 提示3：PHA+6KaB5LiO5Y6f5pa556iL57O75pWw5YGa5q+U6L6DPC9wPg==
- 答案：Qw==
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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f(x)为二次函数，且f(2x+1)+f(2x-1)=16x2-4x+6,则f(x)＝（ ）
| A: 2x2+x+1 |
| B: 2x2-x-1 |
| C: 2x2+x-1 |
| D: 2x2-x+1 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+ZigyeCsxKeS4rTJ4KzHnnIvlgZrkuIDmlbTkvZPluKblhaXmnInns7vmlbDnmoTmlrnnqIs8L3A+
- 提示2：PHA+5Zug5byP5YiG6Kej5ZCO77yM5ZCI5bm2PC9wPg==
- 提示3：PHA+57O75pWw55u45a+55bqUPC9wPg==
- 答案：RA==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.
求过三点O(0,0)、M1(1,1)、M2(4,2) 的圆，这个圆的半径为（ ）；圆心坐标为（ ）
| A: r=5；(4,-3) |
| B: r=2；(4,3) |
| C: r=5；(-4,-3) |
| D: r=2；(-4,3) |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5ZyG55qE5pa556iLeDxzdXA+Mjwvc3VwPit5PHN1cD4yPC9zdXA+K0R4K0V5K0Y9MDwvcD4=
- 提示2：PHA+5Luj5YWl54K555qE5Z2Q5qCHRCxFLEY8L3A+
- 提示3：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
- 答案：QQ==
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
