1. Problem: Solve or analyze the sequence or series related to the triplet "acb". Since the problem is not explicitly stated, let's assume it involves testing convergence of a series or sequence involving terms labeled a, c, b. 2. Formula and rules: - Use the Comparison Test, Root Test, Ratio Test, or nth root Test to determine convergence. - For example, the Ratio Test states: if $L=\lim_{n\to\infty} \left|\frac{a_{n+1}}{a_n}\right|$, then the series converges if $L<1$, diverges if $L>1$, and is inconclusive if $L=1$. 3. Intermediate work: - Identify the general term $a_n$ for the sequence or series. - Compute the limit $L$ using the appropriate test. 4. Explanation: - These tests help determine if infinite sums or sequences approach a finite limit. - The choice of test depends on the form of $a_n$. Since the exact terms are not given, this is a general approach to problems involving "acb". Final answer: Without explicit terms, apply the appropriate convergence test (Ratio, Root, Comparison) to the sequence or series defined by "acb" to determine convergence or divergence.