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Math Help - Un+1 = (Un-1)^2, U1=k, U2+1=U1. find the possible values of k.

  1. #1
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    Question Un+1 = (Un-1)^2, U1=k, U2+1=U1. find the possible values of k.

    To write it out a bit clearer:

    Un+1 = (Un-1)2 , U1=k , U2 +1=U1

    Find the possible values of k.

    I really don't know how to approach this question. Help and advice appreciated.

    Thanks

    age
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  2. #2
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    Re: Un+1 = (Un-1)^2, U1=k, U2+1=U1. find the possible values of k.

    Quote Originally Posted by agehayoshina View Post
    To write it out a bit clearer:

    Un+1 = (Un-1)2 , U1=k , U2 +1=U1

    Find the possible values of k.

    I find this post hard to read.

    Assuming that U_{n+1}=(U_n-1)^2~\&~U_1=k and U_2+1=U_1 is correct, then

    (k-1)^2+1=k.
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  3. #3
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    Re: Un+1 = (Un-1)^2, U1=k, U2+1=U1. find the possible values of k.

    Sorry, formatting isn't my forte. and thanks! this helped.
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