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Base Systems: (Proof track.) Give a complete justification. Find the sum of digits of math in base math.
Convert and compute in bases.
Try the problem
**(Proof track.)** Give a complete justification. Find the sum of digits of in base .
Hint and answer
Concept to use
Digit DP style.
Hint
Expand the numeral as a polynomial in its base and enforce valid-digit constraints.
Answer
17
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