齐线性方程组有非零解的充要条件在初等数学中的应用

An Application of the Necessary and Sufficient Condition of the System of Homogeneous Linear Equations with Untrivial Solution in Elementary Mathematics

用齐线性方程组有非零解的充要条件定理解决初等数学中的某些问题。

The principle of the necessary and sufficient condition applied of the system of homogeneous linear equations is applied in this paper for the solution of some problems in elementary mathematics.