Suppose r is a real number such that 0 < r|< 1. 1 (a) Show that there is a y > 0 such that |r| = 1+y 1 for all n E N. ny (b) Prove that |r"| < (c) Prove that {/nx"} converges to 0. (d) Prove that, if 0 < u < 1, then {nu"} converges to 0. [IIINT: For all n, nu" = (Vnu"/2)2.]

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Suppose r is a real number such that 0< r| < 1.
1
(a) Show that there is a y > 0 such that |r|
1+ y
(b) Prove that |2"| <
for all n E N.
ny
(c) Prove that {Vnx"} converges to 0.
(d) Prove that, if 0 < u < 1, then {nu"} converges to 0.
[IIINT: For all n, nu" = (Vnu"/2)2.]
%3D
Transcribed Image Text:Suppose r is a real number such that 0< r| < 1. 1 (a) Show that there is a y > 0 such that |r| 1+ y (b) Prove that |2"| < for all n E N. ny (c) Prove that {Vnx"} converges to 0. (d) Prove that, if 0 < u < 1, then {nu"} converges to 0. [IIINT: For all n, nu" = (Vnu"/2)2.] %3D
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