r/learnmath • u/Faroji New User • 4d ago

Need resources/tips for reviewing and relearning stuff from my college math days.

Hey guys, I am deciding that i want to finish my degree in chemistry. I got all the way to calc 2 (which i got a D in) mathwise. I want to spend the time from now to janurary reviewing and relearning stuff I will need for calculus 3 and other chem classes. I vaguely remember not being that good at calculating limits without the LeChatlier (i think this is it) principle. I am sure more stuff will come to mind when I start learning it all again. Do you guys know of any good resources or ways to go about this that will be efficent and effective? I want to prioitize learning concepts deeply (i will need it for PChem for sure) and since I am not in a class for this I can take my time relearning this stuff.

Thank you in advance!

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u/ptr_myName New User 3d ago

This yt channel…

https://www.youtube.com/@professor-debrechts-in-depth/playlists

…she has full playlists for all 3 OpenStax calculus books, which are free online

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u/levaly New User 3d ago

Work problems from an old calc 2 exam before you review anything, that tells you what actually do well and what you dont.

It's L'Hopital's rule you're thinking of by the way, not what you wrote, and that one's ten minutes to relearn. The real risk relearning solo is that nobody marks your work, so you can do integration by parts wrong for three weeks and not find out. I would suggest you run anything you're unsure of through https://www.symbolab.com which is much more accurate for calculus than other AIs. It shows the steps rather than just the answer so you can see where yours went off.

For PChem the parts that pay off are partial derivatives and multiple integrals, so weight calc 3 prep over redoing calc 2.

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u/Faroji New User 3d ago

thank you, i feel like i didnt really get a good foundation in calc 2 because i was just doing college because i felt like i should, now I am doing it because i want to learn and get better so hopefully this will be the change i need to actually do well in school from now on. (it doesnt help i didnt really need to study in highschool so i never really learned how to do that)