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

Atul Tiwari , 7 Years ago
Grade 12th pass
anser 1 Answers
Nishant Vora

Last Activity: 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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