deletions | additions       diff --git a/beginproblem_a_You_a.tex b/beginproblem_a_You_a.tex  index 777f682..5f6ae2c 100644  --- 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, $\sum\limits_{i=1}^n i$ can still represent the number of coupons received. However, the value of the coupons is: $1 + 2 + 4 + \ldots+ (n-1) + 2(n-1)$ which can be represented as $\sum\limits_{i=1}^n 2^{n-i}$.   \smallskip  We must multiply the quantity and the value together during each sum  to get the total value resulting in: $W(n) = \sum\limits_{i=1}^n i*2^{n-i}$ \smallskip  \noindent