中学生网络课堂本课配套习题挑战模式1/4
不等式x2－2x－5＞2x的解集是( )
| A: {x|x≥5或x≤－1} |
| B: {x|x＞5或x＜－1} |
| C: {x|－1＜x＜5} |
| D: {x|－1≤x≤5} |
- 提示1：PHA+5YWI56e76aG577yM5YaN5Zug5byP5YiG6KejPGJyPjwvcD4=
- 答案：Qg==
PHA+5LiN562J5byP5YyW5Li6PGVtPng8L2VtPjxzdXA+Mjwvc3VwPu+8jTQ8ZW0+eDwvZW0+77yNNe+8njDvvIw8L3A+PHA+4oi0KDxlbT54PC9lbT7vvI01KSg8ZW0+eDwvZW0+77yLMSnvvJ4w77yM4oi0PGVtPng8L2VtPu+8nO+8jTHmiJY8ZW0+eDwvZW0+77yeNS48YnI+PC9wPg==
本课配套习题挑战模式2/4
不等式9x2＋6x＋1≤0的解集是（ ）
| A: {x|x≠−13 } |
| B: {x|−13 ≤x≤13 } |
| C: ∅ |
| D: {−13 } |
- 答案：RA==
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
本课配套习题挑战模式3/4
不等式3x2－x＋2＜0的解集为( )
| A: ∅ |
| B: R |
| C: {x|−13 ＜x＜12 } |
| D: {x∈R|x≠16 } |
- 提示1：PHA+5Lik56eN5oCd6Lev77yMMeOAgemFjeaWuTLjgIHmsYI8c3BhbiBjbGFzcz0ibWF0aHF1aWxsLXJlbmRlcmVkLW1hdGgiIHN0eWxlPSJmb250LXNpemU6MjBweDsiPjxzcGFuIGNsYXNzPSJ0ZXh0YXJlYSI+PHRleHRhcmVhIGRhdGEtY2tlLWVkaXRhYmxlPSIxIiBjb250ZW50ZWRpdGFibGU9ImZhbHNlIj48L3RleHRhcmVhPjwvc3Bhbj48c3BhbiBtYXRocXVpbGwtY29tbWFuZC1pZD0iNCI+zpQ8L3NwYW4+PC9zcGFuPjxzcGFuPiZuYnNwOzwvc3Bhbj48L3A+
- 答案：QQ==
PHA+W+ino+aekF3jgIDiiLXilrPvvJ3vvI0yM++8nDDvvIzlvIDlj6PlkJHkuIrvvIw8L3A+PHA+4oi0MzxlbT54PC9lbT48c3VwPjI8L3N1cD7vvI08ZW0+eDwvZW0+77yLMu+8nDDnmoTop6Ppm4bkuLriiIUuPC9wPg==
本课配套习题挑战模式4/4
函数y＝√x2+x−12 的定义域是( )
| A: {x|x＜－4，或x＞3} |
| B: {x|－4＜x＜3} |
| C: {x|x≤－4，或x≥3} |
| D: {x|－4≤x≤3} |
- 答案：Qw==
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
