Hi, I have the following problem and I don't know how to go about this... I would really appreciate if you could give me a hand. The problem says: "Let . Show that , where is the sum of digits of (in decimal representation of r)."
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Originally Posted by jmgilbert Hi, I have the following problem and I don't know how to go about this... I would really appreciate if you could give me a hand. The problem says: "Let . Show that , where is the sum of digits of (in decimal representation of r)." If , and since , we get Tonio
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