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Math Help - Analysis Help required

  1. #1
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    Analysis Help required

    i need help with Analysis please!

    how do you prove that a sequence (xn) diverges to infinity if and only if (-xn) diverges to -infinity??

    it seems like quite a simple question but i cant think of a rigorous enough proof. THANKS!
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  2. #2
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    Re: Analysis Help required

    Quote Originally Posted by HelpMePlease28 View Post
    i need help with Analysis please!
    how do you prove that a sequence (xn) diverges to infinity if and only if (-xn) diverges to -infinity??

    If \exist N\in\mathbb{Z}^+ such that n\ge N implies x_n>N what can be said of -x_n~?
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