$V_n = n! + 2$
$n \ge 1$
Find $V_3$.
I am just wondering what does the "!" operator after "$n$" mean?
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2Probably factorial; $n! = n(n - 1)(n - 2) \cdots 3\cdot 2$. In particular, $4! = 4\cdot 3\cdot 2 = 24$. – Nov 11 '13 at 04:18
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@T.Bongers thanks man – Jasmine Nov 11 '13 at 04:46
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It means factorial which can be defined as $\displaystyle n! = \prod_{k = 1}^n k = n \cdot (n - 1) \cdot (n - 2) \cdots 2 \cdot 1$.
As for your original problem $$V_3 = 3! + 2 = 3 \cdot 2 \cdot 1 + 2 = 6 + 2 = 8.$$
Robert Cardona
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