(a) Show that the function Cos(nx) is the eigenfunction of the operator A What is 2 dr2 the eigenvalue of this eigenfunction?

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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(a) Show that the function Cos(nx) is the eigenfunction of the operator A
What is
= -
2 dx2
the eigenvalue of this eigenfunction?
(b) Define two operators P = and X =2x, which means P f(x) = f(x) = f'(x),
8 f(x) = 2xf(x). Are these two operators commutable? [hint: for any f (x), compute P8 f(x)
and X Pf(x), and compare results.)
Transcribed Image Text:(a) Show that the function Cos(nx) is the eigenfunction of the operator A What is = - 2 dx2 the eigenvalue of this eigenfunction? (b) Define two operators P = and X =2x, which means P f(x) = f(x) = f'(x), 8 f(x) = 2xf(x). Are these two operators commutable? [hint: for any f (x), compute P8 f(x) and X Pf(x), and compare results.)
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