通过实例分析，探讨用勒让德多项式和定解条件求解静电场时确定系数的方法。
By analyzing the sample, study the method of seeking given parameters by using Lengendre polynomials and condition of fixed solution.
介绍勒让德方程在自然边界条件下的解，重点推导了勒让德函数的系数。
The solution of Legendre equation has been introduced in the condition of natural limit and the emphasis is put on the inference to the coefficient of the Legendre function.
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