求翻译：运用二阶常系数齐次线性递归方程的特征根解法和待定系数法构建等比数列的方法推导出了Fibonacci数列的通项公式是什么意思？

Use of second order constant coefficient homogeneous linear recurrence equation of the characteristic root solution and the method of undetermined coefficients to build the geometric sequence deduced fibonacci series through term formula

Stage 2 often use Align coefficient linear recursive equations on characteristics of the law and to be certain factors such as the building than the series derived from the method of the Fibonacci series pass-through formula

Often the coefficient homogeneous linear recursion equation characteristic root solution and the undetermined coefficient law construction geometric series method inferred the Fibonacci sequence using two steps to pass a formula

Using second-order constant coefficient homogeneous linear recursion equations characteristic root construction method and the method of undetermined coefficients of derivation method of Geometric progression out of Fibonacci sequences general term equation

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