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X∞n=0 (2 n + 1) x 2 n
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2 votes
X∞n=0
(2
n + 1)
x
2
n

User Tisa
by
4.2k points

1 Answer

2 votes

Answer:3

If x=0 or x=1 it is trivial, so 0<x<1. Define a=1−x2, then 0<a<1.

Explanation:

User Emmanuel Bourg
by
3.8k points
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