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Limits, Continuity & Differentiability
General
Grade 12

Question:

<p>Find f(x) = limn→∞(cos x √n)n.</p>

Step-by-Step Solution

Key Concept: General
<p>1\inftyform. Limit = elim n(cos(x/\sqrt{n})-1) = elim n(-x2/2n) = e-x2/2.</p>
Correct Answer: 2

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