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I currently have Calculus and am half way through the semester. My problem is i really didnt pay attention. We are now upto Implicit Differentiation. And i am totally lost. Do i still have time to catch up? Where can i go online with videos and help that explain everything in good detail. We covered Limits derivates and now Implicit differentation and soon are entering Applying differention. Do you think i still have time to catch up? And where is the best sites preferrebly with videos to help me out here? I dont want to fail calc again :(

Thanks!

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    Actually ive been watching Khan Academy and i learned in 1 day what took 3 weeks for my teacher hahaah!2011-10-22

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These videos are pretty helpful: The Calculus Lifesaver. You may want to get the book as well, and support the creator; it's very reasonably priced (and no, I'm not Adrian Banner).

Also check out MIT's Open CourseWare for Single Variable Calculus. I found the professor to be much drier than Banner's videos, but that is more personal preference than anything. Their course system has it's own study group to ask questions, but of course you can also just post well-crafted questions here. A lot of their materials are available online, so you may be able to just use your own book to supplement it. If you do need their book, however, it's much pricer than Banner's.

With regard to your more general question, "can I catch up", the answer is most assuredly "yes", but in the sense that you will have to be willing to put in the time and effort. Math, perhaps more than most other subjects, builds on itself; each step you take in Calculus is secure and firm because you've carefully laid the foundation before it. You are now in a position where most of what you will come across in your book will require previous results, and if you are not familiar or comfortable with those results then it will be on you to go back and solidify your knowledge.

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    Actually ive been watching Khan Academy and i learned in 1 day what took 3 weeks for my teacher hahaah!2011-10-22
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Find the first section in your text that you do not understand. Read this section, work through examples in the text until you understand them. Then try to work some of the problems for that section. Once you feel that you understand that section estimate how long it took you to do this work. Repeat this for the next section you do not understand. This is probably the next section of your text. The average time it took to learn these two sections will give you a very rough idea of the amount of time you will need to spend on each section you do not understand.

Now you need to ask yourself if the amount of time it will take to catch up will cause problems for all your other classes. Hopefully you are not behind in those classes. If you think you can catch up without messing up your other classes then that might be the thing to do. If you think otherwise, consider cutting your losses by dropping calculus and do well in your other courses. If you take calculus again do not get behind. Work all the problems, perhaps even those that are not assigned.

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    My other classes are easy, and i surely have the time. $I$ guess i need to start asap.2011-10-19
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I'm in fact in the similar position with you and I guess (confidently) that you are in first year in university.

My solution is to read the textbook over, try to absorb the weird and abstract concepts like "infinity" and "limit". Once you get them deep inside your head, you will be fine with differentiation, finding tangent lines and stuff.

The textbook my school uses is Stewart's Calculus: Early Transcendentals. It's a good book with nice examples, pretty straight forward. Hope that helps.

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    Yeah i get that. I get the standard derivates but not the complicated parts where you put many into one equation. I just need to improve. But yeah i dunno this book to me doesnt help much :(2011-10-19
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In addition to the above, find an educational assistance for your class or find a senior student that would be willing to give you some help. Calculus books are plenty. Spend time at the library and try to use other books if you got stuck. Don't try to solve every problem in the book. Focus most on your lecture notes and home work problems. Focus on basics. Refer to Algebra books when if Algebra is not clear. Calculus is very hard to master unless you have solid Algebra.

Never give up!