1. Solve inequalities separately: Solve every inequality in the inequality group.
2. Solution set rule: find the solution set rule of each inequality.
3. Solution set: According to the law of each inequality solution set, find the common part.
4. Verification: Verify whether the solution set of the inequality group is correct.
Formulas that are connected by greater than sign, less than sign, unequal sign, greater than or equal to or less than or equal to each other and have a size relationship are called inequalities. Several inequalities stand together and are called inequality groups. (Note: When there is a
To solve inequality groups, we can first calculate their solution sets one by one, and then express them on the number axis respectively. If the solution sets of two unknowns are the same to the left on the number axis, the solution set of the unknown on the left is the same as the solution set of the inequality group.
The benefits of learning mathematics:
1 helps us to understand the world better: mathematics is the language to describe and explain the world. By studying mathematics, we can better understand natural phenomena, scientific principles and social phenomena.
2. Cultivate logical thinking ability: Mathematics is a kind of logical thinking training. By studying mathematics, we can cultivate the ability of logical thinking and improve the ability of analyzing and solving problems.
3. Enhance computing ability: Mathematics is a kind of computing training. By studying mathematics, we can improve our computing ability and better meet the computing needs in daily life and work.
4. Cultivate creativity: Mathematics is a creative subject. By studying mathematics, we can cultivate creativity, discover new mathematical laws and solve problems.