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For any given positive integer k, let the decimal representation of a number m be denoted by [m], and let k be multiplied by successive prime numbers to form the number S=0,[2k][3k][5k][7k]....
For example, for k=2, we get S=0.461014...
For which values of k is the number S rational?
For example, for k=2, we get S=0.461014...
For which values of k is the number S rational?
This post has been edited 1 time. Last edited by mathservant, Yesterday at 5:58 AM