, where is an integer, is equal…

MATHEMATICS · Single correct · AP · Calculus AB · Limits and Continuity · Limits and Continuity

Problem

lim⁡n→∞cos⁡(πn2+n)\lim_{n\to\infty}\cos\left(\pi\sqrt{n^2+n}\right), where nn is an integer, is equal to (1) 1 (2) -1 (3) 0 (4) Does not exist

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