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Questions › DSE › DSE 2018 › Q8
4 marks, −1Mathematics › Sequences, series and convergence › Sequences and their limitsModerateabout 2 min

DSE 2018 Question 8: Sequences, series and convergence

A sequence of real numbers (xn)(x_n)(xn​) converges to xxx. Consider the following claims: (I) The sequence (xn+1/xn)(x_{n+1}/x_n)(xn+1​/xn​) converges to 111. (II) The sequence (xn+xn+1)(x_n + x_{n+1})(xn​+xn+1​) converges to 2x2x2x. Which of the following is correct?

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Plain-text version

A sequence of real numbers (xₙ) converges to x. Consider the following claims: (I) The sequence (xₙ₊₁/xₙ) converges to 1. (II) The sequence (xₙ + xₙ₊₁) converges to 2x. Which of the following is correct? (A) Only statement II is correct (B) Only Statement I is correct (C) None of the statements is correct (D) Both the statements are correct

Also written as: A sequence of real numbers (x_n) converges to x. Consider the following claims: (I) The sequence (x_(n+1)/x_n) converges to 1. (II) The sequence (x_n + x_(n+1)) converges to 2x. Which of the following is correct?

Sequences, series and convergence has come up 33 times in 5 exams since 2006.

What this question tests

This question is on Sequences and their limits, part of Sequences, series and convergence in Mathematics.

Whether a sequence settles down and what it settles to.

TestStop has 10 past-paper questions on this subtopic.

Practise Sequences, series and convergenceMore on Sequences and their limits

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Question from the DSE 2018 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.