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Random Problem

Revision as of 11:04, 30 January 2023 by Mathboy100 (talk | contribs) (→‎Medium Problem)

Easy Problem

The sum\[\frac{1}{2!}+\frac{2}{3!}+\frac{3}{4!}+\cdots+\frac{2021}{2022!}\]can be expressed as $a-\frac{1}{b!}$, where $a$ and $b$ are positive integers. What is $a+b$?

$\textbf{(A)}\ 2020 \qquad\textbf{(B)}\ 2021 \qquad\textbf{(C)}\ 2022 \qquad\textbf{(D)}\ 2023 \qquad\textbf{(E)}\ 2024$

Solution

???

Medium Problem

Show that there are no finite decimals $0.\overline{a_1a_2a_3}$

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