Homework: Finding an antiderivative

twinebiscuit
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Homework Statement


dy/dx = y(1-y)


Homework Equations





The Attempt at a Solution


dx = dy(y(1-y))?
 
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What do you know about separation of variables ?
 


that you can separate them if there is an x and a y on the right side of the equation and they are multiplying
 


Alright, so can you separate x and y in your equation ?
 


I don't think so because there is no x on the right side it's only y?
 


Alright, then, you must reread your notes, because the equation you posted is separable, as it's a simpler case of the general

\frac{dy}{dx} = X(x)Y(y)

In your case, X(x)=1, so the variables can be separated.
 
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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