If \(u = e^{\frac{(x^2+y^2)}{x+y}}\) Then, \(x^2 \frac{∂^2 u}{∂x^2}+y^2 \frac{∂^2 u}{∂y}+2xy \frac{∂^2 u}{∂x∂y}\)=?
Posted: Thu Jul 14, 2022 9:29 am
a) u ln(u)
b) u ln(u)2
c) u [1+ln(u)]
d) 0
b) u ln(u)2
c) u [1+ln(u)]
d) 0
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