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Part CCSIR NET December 2024the-rearrangement-decides-which-root-attracts

The rearrangement decides which root attracts

Consider the following statements: : There exists an such that , the iterative sequence defined by , converges to : There exists an such that , the iterative sequence defined by , converges to : There exists an such that , the iterative sequence defined by , converges to 3. Then which of the following statements are true?

  1. A. and are true but NOT
  2. B. and are true but NOT
  3. C. and are true but NOT
  4. D.Each of , and is true

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

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50 are analysed free — try those first.

Related counterexample: Newton's method converges quadratically to any root

More on this topic

The chapter behind this: Root finding and orders of convergence — free to read

From Numerical AnalysisRoot finding: bisection, Newton–Raphson, fixed point, order of convergence

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