Question: Identify which of the following functions are eigen functions of the operator d/dx: (a) D2/dx2, (b) Cos kx, (c) K, (d) Kx, (e) e-ax2. Give

Identify which of the following functions are eigen functions of the operator d/dx:
(a) D2/dx2,
(b) Cos kx,
(c) K,
(d) Kx,
(e) e-ax2. Give the corresponding eigen value where appropriate.

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