How Do You Integrate \(\int \frac{u}{5u+11} \, du\) Using Substitution?

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integral calculus--pls integrate

Homework Statement


how do you integrate this one?what method do I have to use?
\int\left\left[(u/\left(5u+11\right)\right]
 
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Can I assume that you really mean
\int\left\left[(u/\left(5u+11\right)\right]du?
Integrals don't make much sense without the differential! (And I want to be certain that you mean u as the variable of integration!)

Have you considered the substitution x= 5u+ 11? (And having that "du" in the original integral will remind you that you need to use du= dx/5.) That will make the denominator very easy! Of course, u= (x-11)/5 but that's in the numerator and is no problem.
 
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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