The root test is a more general version of the ratio test that considers the nth root of the absolute value of each term instead of just the ratio. If this nth root is less than 1, the series converges, and if it's greater than 1, it diverges.
The root test is a more general version of the ratio test that considers the nth root of the absolute value of each term instead of just the ratio. If this nth root is less than 1, the series converges, and if it's greater than 1, it diverges.