ABSTRACT
D = 1, the d’Alembert criterion cannot be used for deciding whether the series is convergent or divergent.
4. Cauchy criterion. Suppose that there exists the limit (finite or infinite) lim n→∞
n √ an = K.
D = 1, the d’Alembert criterion cannot be used for deciding whether the series is convergent or divergent.
4. Cauchy criterion. Suppose that there exists the limit (finite or infinite) lim n→∞
n √ an = K.