The general steps of finding the analytic expression of function by undetermined coefficient method Be specific

The general steps of finding the analytic expression of function by undetermined coefficient method Be specific

The general steps are as follows:
(1) Write out the general formula of the analytic expression of the function, including the unknown coefficients;
(2) By substituting the corresponding values of the independent variable and the function into the analytic expression of the function, the equations or equations with undetermined coefficients are obtained
(3) Solve the equation (Group) to find out the value of undetermined coefficient, so as to write the function analytic formula
In this lesson, we further study the solution of quadratic function analytic formula