Analysis: Sets A & B - Does B Contain a Limit Point of A?

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Homework Statement



Suppose that each of A and B is a set such that:
(a) A is a subset of [0,1], B is a subset of [0,1]
(b) Neither of A or B is empty
(c) 0 (zero) is an element of A
(d) The union of A & B = [0,1]
(e) A & B are disjoint
(f) A contains no limit points of B.

Then, B contains a limit point of A.

Homework Equations


None

The Attempt at a Solution


Not sure where to go with it...
 
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If A contains no limit point of B, then what kind of points does A consist of? (What must A look like near 0? How far from 0 can you "push" this appearance?)
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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