The solution of two order homogeneous linear differential equation which is important in practice and theory is researched by basing on reference[1] and the new practical soluble sufficient condition of variable coefficient two order linear differential e
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张学元.二阶线性齐次微分方程的一个可解定理[J].重庆工商大学学报(自然科学版),1990,(4): Zhang Xueyuan. A Soluble Theorem of Two Order Homogeneous Linear Differential Equation[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),1990,(4):