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Limits, Continuity & Differentiability
General
Grade 12

Question:

<p>If limx→1 x+x2+···+xn−n x−1 = 820, then n is equal to:</p>

Step-by-Step Solution

Key Concept: General
<p>n(n + 1)/2 = 820 =\Rightarrow n = 40.</p>
Correct Answer: (40)

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