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Formula Formulation (Posted on 2014-03-03) Difficulty: 3 of 5
A function f(N) is defined as:
f(1)=sod(12), f(2) = sod(122)
f(3) = sod(1212), f(4) = sod(12122), .... and, so on

Derive the general formula for f(N) in terms of N.

*** sod(x) denotes the sum of the digits of base ten expansion of x.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Some Thoughtsre: first few -- larger nCharlie2014-03-03 17:27:31
Some Thoughtsfirst fewCharlie2014-03-03 17:22:45
Some Thoughtsfirst findingsJer2014-03-03 16:26:12
QuestionClarificationtomarken2014-03-03 16:25:03
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