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Math Help - Prove 1<a<2 ? Please help

  1. #1
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    Prove 1<a<2 ? Please help

    Hey Forum!
    So i stumbled upon this question and im having difficulty proving it. =/
    Any help would be appricited.

    Prove 1&lt;a&lt;2 ? Please help-3.57.png
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  2. #2
    MHF Contributor Also sprach Zarathustra's Avatar
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    n/{1/a+1/b}<=sqrt{ab}<={a+b}/2
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  3. #3
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    Quote Originally Posted by Also sprach Zarathustra View Post
    n/{1/a+1/b}<=sqrt{ab}<={a+b}/2
    Im confused... how does that prove it?
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  4. #4
    MHF Contributor chiph588@'s Avatar
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    Quote Originally Posted by jess0517 View Post
    Hey Forum!
    So i stumbled upon this question and im having difficulty proving it. =/
    Any help would be appricited.

    Click image for larger version. 

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    Try inducting on  n for both inequalities.
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  5. #5
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    Thread closed due to this member deleting questions after getting help.
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