College Math

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I am really struggling with this Fibonacci number problem. If the greates common factor of "m" and "n" is "r", then the greatest common factor of Fm and Fn is Fr. Show that this is true for m=6 and n=9. I am so confused

  • College Math -

    F6 = 8
    F9 = 34

    gcd of 6 and 9 is 3

    F3 = 2, the gcd of 8 and 34

  • College Math -

    how to do sets

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