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jpl

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I'll second what Maureen said. I just started as a volunteer today, and the number of unanswered questions is overwhelming. Policy questions are "above my pay grade", but, having worked through m...
I'm inclined to agree. In addition to Khan Academy, I spend some time taking courses from thegreatcourses.com, including one on discrete math by Arthur Benjamin. But courses there aren't free, a...
From the syllabus, it looks like https://www.khanacademy.org/math/differential-calculus is a good place to start. You might want to consider the precalculus videos as well. https://www.khanacad...
Your question is closely related to the topic of "limits" https://www.khanacademy.org/math/precalculus/limit_topic_precalc and the notion of probability density functions https://www.khanacademy...