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E32

[1SK] Prerequisites:[19M], [1SF].

Fix πœƒ,πœβˆˆβ„‚ with πœƒβ‰ πœ, q(x) a polynomial, and kβˆˆβ„•. Let’s define p(x)=(xβˆ’πœƒ)k. Show that

p(D)f(x)=e𝜏xq(x)

if and only if

f(x)=eπœƒxr(x)+e𝜏xq~(x) ,

with r polynomial of degree at most kβˆ’1 and q~ polynomial of the same degree as q.

Solution 1

[1SM]

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