Scaling method is one of the methods to prove inequality, and there are comparison method, synthesis method, analysis method, reduction to absurdity, method of substitution and so on.

The so-called scaling method needs to prove the inequality a>b, and sometimes one side of it can be enlarged or reduced to find an intermediate quantity, such as enlarging A to C, that is, A.

The theoretical basis of scaling method mainly includes: 1. Transitivity of inequality; 2. Equal amount plus unequal amount is unequal amount; 3. Comparison of two fractions with the same numerator but different denominator.

Scaling method is a thinking method that guides the direction of deformation through inequality proof.

Note: 1. Zoom in the same direction.

2. release, moderate contraction.