1. Compute the first five terms of the following sequences (start with $n = 1$): (a) $a_n = \frac{n!}{2^n}$ (b) $b_n = n + (-1)^n$ (c) $c_n = n + (n+1) + (n+2) + \dots + (2n)$ (think carefully about this one!)
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$a_1 = \frac{1!}{2^1} = \frac{1}{2}$ $a_2 = \frac{2!}{2^2} = \frac{2}{4} = \frac{1}{2}$ $a_3 = \frac{3!}{2^3} = \frac{6}{8} = \frac{3}{4}$ $a_4 = \frac{4!}{2^4} = \frac{24}{16} = \frac{3}{2}$ $a_5 = \frac{5!}{2^5} = \frac{120}{32} = \frac{15}{4}$ Show more…
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