Deriving the Long Run Marginal Cost Curve 

Thanks for the comment, that's so nice thankyou!

No problem 😊 Good luck with your study, thanks for the comment!!

You're welcome, thanks for the comment and for watching! There are so many good books. I like www.routledge.com/Essentials-of-Microeconomics/Nguyen-Wait/p/book/9781138891364, there are a few typos (watch out especially for a couple of typos around the section where they explain derivatives) but I like this book because it's small and concise. There are no case studies or long discussions, it's quite to the point, and so for the basic theory, it's much easier to study than the bigger books. If you want something meatier, I've recently been using Karlan and Morduch, www.mheducation.com/highered/product/economics-karlan-morduch/M9781260225310.html. I have the second edition. I think it's quite comprehensive and concise. The diagrams are pretty neat. from what I can see I only disagree with their treatment of the LRAC curve and its connection to returns to scale and economies of scale (though I disagree with a lot of people about this particular topic!). I haven't gone through this book in detail though, but I do often go to it if I want clarification. The last resource that is good is this one: ecampusontario.pressbooks.pub/principlesofmicroeconomicscdn/front-matter/about-this-book/ and this one. Online resources are often good because errors can be changed quickly in the digital format. So if it comes from a good place, it's often more reliable than a paper book, because any errors have already been changed. I will say though, sometimes curriculums can be quite specific, in which case it's best to concentrate primarily on the texts suggested by your lecturer.

Thank you so much for replying!