Comparing Integrals: Test for Convergence/Divergence

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Homework Statement



Use comparison test to see if the integral is convergent or divergent.

Homework Equations



integral [1,∞] (2+e^(-x))/x



The Attempt at a Solution



My books says that (1+e^(-x))/x is divergent and since my integral is bigger it is divergent also.
TRUE OR FALSE? Thanks for the help
 
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Jbreezy said:

Homework Statement



Use comparison test to see if the integral is convergent or divergent.

Homework Equations



integral [1,∞] (2+e^(-x))/x



The Attempt at a Solution



My books says that (1+e^(-x))/x is divergent and since my integral is bigger it is divergent also.
TRUE OR FALSE? Thanks for the help

Compare your integral with ##\int_1^\infty \frac 2 x~dx##.
 
Your integral also Diverges. So it diverges I like yours better though.
I have another one I will post in another forum. In a bit. Thanks.
 
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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