Calc 2 Video Lectures: Help Me Find the Best from MIT OCW

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im looking for some good video lectures on calc2 MIT OCW only covers calc1 and 3 help me please thankyou
 
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Paul's Online Math Notes aren't video lectures, but they're probably just as good. They're easier to read than most textbooks and cover Pre-Calculus to Differential Equations.
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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