Suppose that f is analytic on a domain D andVz € D,f'(z) = af(z) for some constant a. Show that f(2) = cexp(az) for some constant c € C.

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ISBN:9780470458365
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Chapter2: Second-order Linear Odes
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Suppose that f is analytic on a domain D and Vz e D,f'(2) = af(z)
for some constant a. Show that f(2) = cexp(az) for some constant c € C.
4.
(Hint: you might want to
• First, show that if g(z) is analytic on a domain D with g'(z) = 0 for
all z € D, then g is constant on D;
• Next, consider g(z) = e-«² f(z).
Transcribed Image Text:Suppose that f is analytic on a domain D and Vz e D,f'(2) = af(z) for some constant a. Show that f(2) = cexp(az) for some constant c € C. 4. (Hint: you might want to • First, show that if g(z) is analytic on a domain D with g'(z) = 0 for all z € D, then g is constant on D; • Next, consider g(z) = e-«² f(z).
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