Find first derivative of given function and express answer in fully si

digidako
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G(x)=3x * (1-2x^2)^-1/3

See attached photo for my proof, I'm sure its not right.
 

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It won't let me upload my image. Says I need to contact an admin
 
There, attachment has been uploaded. sorry about that
 
Nothing ?
 
Check your cancellations. Remember, you can only cancel one thing with another if they are multiplied together
 

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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