Inequalities can be represented by mathematical symbols, such as >; ; 、& lt； , ≥, ≤, etc. Inequality can be used to describe and analyze various situations, such as in mathematics, physics, engineering, economy and other fields. Inequalities are widely used. For example, when solving practical problems, we often need to solve unknowns according to some known conditions, so we need to use inequalities to build mathematical models and solve them.
The solution of inequality is also a very important part, which involves how to solve the unknown according to the relationship between known conditions and inequalities. When solving inequality, we need to consider how to transform inequality into a form that is easy to solve, and use known conditions to solve unknowns.
Inequalities are also widely used in other fields. For example, in physics, inequalities can be used to describe the laws in natural phenomena such as mechanics, electromagnetism and optics. In economics, inequality can be used to describe and analyze the relationship between various economic variables; In engineering, inequality can be used to describe and analyze the relationship between various technical parameters.
The essence of inequality:
1, symmetry: if A >；; ; B, then b; ; b & gt； 0, then when A is multiplied by a positive number, the result will be greater than that of B multiplied by this positive number. This property can be used to scale inequalities.