does the series converge or diverge n=1 e^n/1+e^2n?

n=1 e^n/1+e^2n thanx

2 Answers

  • 8 years ago
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    Do you really mean a series? If you mean the series

    Σ eⁿ/(1 + e^(2n)),


    then yes it is convergent. If you do a limit comparison test to the convergent geometric series Σ 1/eⁿ, you get

    lim (eⁿ/(1 + e^(2n))/(1/eⁿ) = 1.


    As this limit is positive and finite, both series converge or both series diverge. The series Σ 1/eⁿ is known to be convergent, so your series is also convergent.

    You can also use the integral test, or direct comparison, or some other test.

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  • 8 years ago


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