I’ve just discovered you can use LaTex markup in WordPress.
Here’s the example they give:
It works for me!
And does it work in comments?
Yes. It does.
So, my comment on Enigma 1728 might look like this:
By using the observation that the minimum distance occurs when J is travelling directly towards K, you can deduce the equation for the minimum distance as:
or more generally:
where is the ratio and is the initial distance between Joe and Ken.
By differentiation we find this is minimised in the case where .
And the solution follows.
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