1.

Let ∑un be a series of positive terms. Given that ∑un is convergent and also\(\begin{array}{*{20}{c}} {lt}\\ {n \to \infty } \end{array}\frac{{{u_{n + 1}}}}{{{u_n}}}\) exists, then the said limit is

A. Necessarily equal to 1
B. Necessarily greater than 1
C. Necessarily less than 1
D. May be equal to 1 or less than 1
Answer» D. May be equal to 1 or less than 1


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