Let u=f(√(x^2+y^2 )) satisfies (∂^2 u)/(∂x^2 )+(∂^2 u)/(∂y^2 )=

匿名用户 最后更新于 2021-10-17 21:21 数学类Mathematics

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Let u=f(vx2+y2)satisfies a2ua2u dudwx2ay2s21+v2+w2, and lim f'(x)=0 (1)Find f() (2)If f()=0, find lim f(x)x2


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