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Classical examples of compulsory functions in senior one mathematics.
Example: let f(x) be defined as g(x)=a(x-2)-2(x-2)3(a is a constant).

The analytical formula for finding f(x) from (1) is as follows.

(1) even function

(2) the symmetry axis is x= 1(3) a function g(x) with a defined domain.

(4) Parameter A firstly analyzes the solution with x= 1 as the symmetry axis: ∵x= 1 as the symmetry axis ∴f(x)=f(2-x)∵x It is necessary to classify and discuss 2-x.