Problem 4. Consider the function µ: N→Z defined as follows: u(1) =1 and if n 2 2, then S(-1), ifn P1... P, uhere the Pi are distinct; H(n) = otherwise. For instance, u(15) = 1, µ(3) = -1, and u(18) = 0. (1) Is the function u completely multiplicative? If yes, prove this, otherwise show that it is not by exhibiting an example. (2) Is the function u multiplicative? If yes, prove this, otherwise show that it is not by exhibiting an example.
Problem 4. Consider the function µ: N→Z defined as follows: u(1) =1 and if n 2 2, then S(-1), ifn P1... P, uhere the Pi are distinct; H(n) = otherwise. For instance, u(15) = 1, µ(3) = -1, and u(18) = 0. (1) Is the function u completely multiplicative? If yes, prove this, otherwise show that it is not by exhibiting an example. (2) Is the function u multiplicative? If yes, prove this, otherwise show that it is not by exhibiting an example.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Problem 4. Consider the function u: N Z defined as follows: u(1) = 1 and if n 2 2, then
if n =
S(-1)",
... P. where the p, are distinct;
µ(n) =
otherwise.
For instance, p(15) = 1, µ(3) = -1, and u(18) = 0.
(1) Is the function u completely multiplicative? If yes, prove this, otherwise show that it is not by
exhibiting an example.
(2) Is the function u multiplicative? If yes, prove this, otherwise show that it is not by exhibiting
an example.
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