Let (∂^2 z)/(∂x^2 )-y(∂^2 z)/(∂y^2 )-1/2 ∂z/∂y=0 as (

匿名用户 最后更新于 2021-10-17 20:37 数学类Mathematics

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a2z a2z 1az a-z Let ax2Yay2 2ay =0 in the variations audv (u=x+ Calculate a. v=x+2,y


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