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Problem
Problem
Evaluate
lim
x
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x
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x
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x
n
−
n
x
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1
\lim_{x \to 1} \frac{x + x^2 + \dots + x^n - n}{x - 1}
lim
x
→
1
x
−
1
x
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x
2
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⋯
+
x
n
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n
.
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