Showing that the absolute value of |X| converges almost surely.

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Here is my question and my solutions. I am just curious if this makes sense. Q2 and A2

If something is wrong, then it will be nice if you can correct it for me or provide another solution. Please and thank you!

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To elaborate on copper.hats comment, if $\mathbb P(X>10)>0$ then there exists some integer $m$ such that $\mathbb P\left(X>10+\frac1m\right)$. But this implies that $\mathbb P\left(|X-X_m|\geqslant \frac1m\right)$, and contradicting the assumption that $$ \lim_{n\to\infty}P\left(|X-X_n|\geqslant \frac1n\right) = 0. $$