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Ratio Test

Ratio Test

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In Probability,

L≡lim⁡n→∞∣an+1an∣L \equiv \lim_{n \to \infty} |{a_{n+1} \over a_n}|
  • L<1L < 1: Series converges absolutely.
  • L>1L > 1: Series diverges.
  • L=1L = 1: Test fails.
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