EC > GATE 2022 > Partial Differential Equations
Consider the following partial differential equation (PDE)
a ∂2f(x, y)/∂x2 + b ∂2f(x, y)/∂y2 = f(x, y),
where a and b are distinct positive real numbers. Select the combination(s) of values of the real parameters ξ and η such that f(x, y) = e(ξx+ηy) is a solution of the given PDE.
A
ξ = 1/√(2a), η = 1/√(2b)
B
ξ = 1/√a, η = 0
C
ξ = 0, η = 0
D
ξ = 1/√a, η = 1/√b

Correct : b

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