When integrated 1/y^2 becomes -1/y why is this?

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when integrated 1/y^2 becomes -1/y why is this?
 
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If you mean integrating with respect to y, try taing the derivative of -1/y.
 
i still don't understand
 
daveb said:
If you mean integrating with respect to y, try taing the derivative of -1/y.

escobar147 said:
i still don't understand
daveb is asking you to find this derivative:
$$\frac{d}{dy}\left(\frac{-1}{y}\right)$$
 

Thread 'Finding the nth roots of a complex number'

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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