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Consider the sets A and B

A = the partial sums of

B = 1+ the partial sums of

>A:[0.9, 0.99, 0.999, 0.9999, ...]

>B:[1.9, 1.99, 1.999, 1.9999, ...]

Let set C = A union B.

>C:[0.9, 0.99, 0.999, ... , 1.9, 1.99, 1.999, ...]

where is 1 in C?

Can 1 in C be indexed?

Does 1 exist in C?