A student claims that the alternating-series error bound guarantees the remainder…

MATHEMATICS · Subjective · AP · Calculus BC · Infinite Sequences and Series · Infinite Sequences and Series

Problem

A student claims that the alternating-series error bound guarantees the remainder after five terms of the series ∑n=1∞(−1)nnn+1\displaystyle\sum_{n=1}^{\infty}(-1)^{n}\dfrac{n}{n+1} is less than the magnitude of the 6th term. State whether the claim is correct or incorrect and give a specific reason based on the required conditions.

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