Prove the Root Property for Limits: Suppose {an} converges to a, an > 0 for each n E N, and m E N. Prove that {anm} converges to a/m. That is, prove that, if {am} is a sequence of non-negative terms, then for all m e N, lim Van = lim an n00 provided lim a, exists. (HINTS: • First, argue that, under the hypotheses, the number a must be non-negative. • Prove the result first in the case that a = = 0.

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Prove the Root Property for Limits: Suppose {a,} converges to a, a, 2 0 for each
nEN, and m E N. Prove that {anm} converges to a'/m. That is, prove that, if {an}
is a sequence of non-negative terms, then for all m e N,
lim an =
/ lim an
n-00
provided lim an exists.
00-u
(HINTS:
• First, argue that, under the hypotheses, the number a must be non-negative.
• Prove the result first in the case that a = 0.
• To prove the result if a > 0, use the Difference of Powers Formula:
т-1
m-1-k k
1" – y" = (x – y)E
k=0
anm and y =
= a'/m and the Comparison Lemma.
You may use standard properties of exponents like (r") = ra$.)
with r
Transcribed Image Text:Prove the Root Property for Limits: Suppose {a,} converges to a, a, 2 0 for each nEN, and m E N. Prove that {anm} converges to a'/m. That is, prove that, if {an} is a sequence of non-negative terms, then for all m e N, lim an = / lim an n-00 provided lim an exists. 00-u (HINTS: • First, argue that, under the hypotheses, the number a must be non-negative. • Prove the result first in the case that a = 0. • To prove the result if a > 0, use the Difference of Powers Formula: т-1 m-1-k k 1" – y" = (x – y)E k=0 anm and y = = a'/m and the Comparison Lemma. You may use standard properties of exponents like (r") = ra$.) with r
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