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Dat Do edited beginproblem_a_You_a.tex
about 10 years ago
Commit id: 99016fa83fd12027ef0cabebc2377d5194002fb2
deletions | additions
diff --git a/beginproblem_a_You_a.tex b/beginproblem_a_You_a.tex
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\noindent
(b) Since we are still receiving one extra coupon for each consecutive day, $\sum\limits_{i=1}^k i$ can still represent the number of coupons received. However, the value of the coupons is: $1 + 2 + 4 + 8 + \ldots + 2{n-1}$ which can be represented as $\sum\limits_{i=1}^n 2^{n-i}$.
\smallskip
We must multiply the quantity and the value together to get the total value resulting in:
$\sum\limits_{i=1}^n $W_n) = \sum\limits_{i=1}^n i*2^{n-i}$