\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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In the general identity \(a^n - b^n = (a - b) \sum_{k=0}^{n-1} a^{n-1-k} b^k\), how many terms are inside the summation symbol?
\(n - 1\)
\(n\)
\(n + 1\)
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