不等式的交集

Task

Visualize inequalities and create conjunctions by following the instructions below.

1.	Enter the inequality into the Input Bar. The half plane representing the inequality will be labeled a and displayed in the Graphics View.
2.	Enter the inequality into the Input Bar. The half plane representing the inequality will be labeled b and displayed in the Graphics View.
3.	Change the color of inequality b.
4.	Enter the conjunction into the Input Bar. The area representing the conjunction of a and b will be labeled c and displayed in the Graphics View.
5.	Change the color of the conjunction c.
6.	Hide both inequalities a and b by selecting the enabled Visibility buttons on the left in the Algebra View.