root test

noun Mathematics.
the theorem that a given infinite series converges if the n th root of the absolute value of the n th term approaches a limit less than 1 as n increases without bound. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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We need to conduct the unit root test for each series.
Sitting root test is positive bilaterally for low back pain only.
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