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The Differential Equation Is Select All That Apply

Question 19

Multiple Choice

The differential equation ∂2u∂x2+∂2u∂x∂y+∂2u∂y2=u\frac { \partial ^ { 2 } u } { \partial x ^ { 2 } } + \frac { \partial ^ { 2 } u } { \partial x \partial y } + \frac { \partial ^ { 2 } u } { \partial y ^ { 2 } } = u is Select all that apply.


A) linear
B) nonlinear
C) hyperbolic
D) elliptic
E) parabolic

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