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These questions are from permutations combination please solve questions 40,41,42

These questions are from permutations combination please solve questions 40,41,42

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Grade:12th pass

1 Answers

Nishant Vora IIT Patna
askIITians Faculty 2467 Points
7 years ago
distance travelled on kth day =k (2^{n+1-k})

Total distance travelled =\sum_{k=1}^{n}k (2^{n+1-k})

\sum_{k=1}^{n}k (2^{n+1}{2^-k})
\sum_{k=1}^{n}k (2^{n+1}){2^{-k}}

(2^{n+1})\sum_{k=1}^{n}k {2^{-k}}



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