Topology-Semiregular Spaces and Nonhomeomorphic

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For a space (X,T) must there be a topology W on X coarser than T such that (X,W) is semiregular other than the indiscrete topology and if so are there two such nonhomeomorphic topologies neither of which are the indiscrete topology?

I know that any regular space is semi regular and that for instance R and R^2 are nonhomeomorphic.
 
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Think about finite spaces.
 
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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