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    I really don't understand my notes or anything I have found online about convergence. The question I still trying to answer is.
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    I would post what I already have but none of it makes hence to me and it's just a copy of my notes.

    And he would be appreciated. Thanks
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    Look at the errors in each term. The ratio of the error in one term divided by the square of the error in the previous term should be approximately constant if there is quadratic convergence.
 
 
 
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