this is for holding javascript data
Dat Do edited beginproblem_a_You_a.tex
about 10 years ago
Commit id: 75e716d11578226f3b1d8a9ae7d47b38dbb26633
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\end{problem}
\textbf{Solution 1: }
(a) Since we are receiving one extra coupon for each consecutive day, the total coupons received for
$n$ $k$ days can be represented as
$\sum\limits_{i=1}^n $\sum\limits_{i=1}^k i$ = $\frac{n(n+1)}{2}$