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5.2.4. Integral sign of convergence
Lecture
Let the function f ( x ) be continuous, positive and not increase with x ≥ N ( N ≥ 1 is a positive integer). Row with members u n = f ( n ) converges or diverges simultaneously with the improper integral .
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with members u n = f ( n ) converges or diverges simultaneously with the improper integral 
. 
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