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求微分方程(1-x^2)dy+(2xy-cosx)dx=0满足初始条件y(0)=1的特解
人气:490 ℃ 时间:2019-08-18 02:05:09
解答
(1-x^2)dy+(2xy-cosx)dx=0
(1-x^2)dy+yd(x^2-1)=cosxdx
dy/(1-x^2)+yd(1/(1-x^2))=cosxdx/(1-x^2)^2
d(y/(1-x^2))=cosxdx/(1-x^2)^2
通解y/(1-x^2)=∫cosxdx/(1-x^2)^2
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