The problem asks students to explore the vector relationship between
| Interval | $x < 3-\sqrt7$ | $3-\sqrt7 < x < 3$ | $3 < x < 4$ | $4 < x < 3+\sqrt7$ | $x > 3+\sqrt7$ | | :--- | :---: | :---: | :---: | :---: | :---: | | | $+$ | $-$ | $+$ | $-$ | $+$ |
The problem asks students to explore the vector relationship between
| Interval | $x < 3-\sqrt7$ | $3-\sqrt7 < x < 3$ | $3 < x < 4$ | $4 < x < 3+\sqrt7$ | $x > 3+\sqrt7$ | | :--- | :---: | :---: | :---: | :---: | :---: | | | $+$ | $-$ | $+$ | $-$ | $+$ |