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Summation manipulation.
3
Comparison test.
2
Lim sup definition
1
Identity proof $(x^{n}-y^{n})/(x-y) = \sum_{k=1}^{n} x^{n-k}y^{k-1}$
1
Argumentation, series and convergence
68
Reputation
+5
Lim sup definition
+5
Identity proof $(x^{n}-y^{n})/(x-y) = \sum_{k=1}^{n} x^{n-k}y^{k-1}$
+20
Summation manipulation.
+5
Argumentation, series and convergence
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convergence
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limsup
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