Determine which of the following functions are eigenfunctions of the inversion operator (which has the effect
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Determine which of the following functions are eigenfunctions of the inversion operator î (which has the effect of making the replacement x → −x):
(a) X3 − kx,
(b) Cos kx,
(c) X2 + 3x − 1.
State the eigenvalue of î when relevant.
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