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# Vieta Jumping

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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. I saw the classic IMO example involving this with a decreaasing sequence of roots mmeaning that we had to reach a square. But I don't understand how all solutions are squares because if it holds for some 0 in the sequence and a_n then what says it holds for the pair a_n-1 and a_n
2. (Original post by 11234)
I saw the classic IMO example involving this with a decreaasing sequence of roots mmeaning that we had to reach a square. But I don't understand how all solutions are squares because if it holds for some 0 in the sequence and a_n then what says it holds for the pair a_n-1 and a_n
never mind I get it now

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