Isomorphic function technique is a method to prove inequality. Its basic idea is to transform the inequality to be proved into an equivalent form, and then prove it by using known monotonicity or some special properties. Isomorphic function technology is particularly useful in dealing with mixed inequalities, but it requires high algebraic deformation ability and long-term accumulation.

The basic steps of isomorphic functional technology are as follows:

1. Arrange the inequality to be proved into the form of f(h(x))~f(g(x)).

2. Transform into the form of h(x)~g(x) by using the monotonicity of f(x).

3. Prove the transformed inequality by using known properties or constructing auxiliary functions.