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Math Help - calculus convergence

  1. #1
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    calculus convergence

    really need help urgently plz
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  2. #2
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    Notice that,

    1/(2sqrt(n)+1) <= 1/(2sqrt(n)+cos(n))

    Show that,

    SUM 1/(2sqrt(n)+1) = +oo

    Then use comparasion test.
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