Current location - Training Enrollment Network - Mathematics courses - Mathematical analysis, this is the solution of the exercise. I don't quite understand. Is o () infinitesimal or infinite? What is the train of thought of this question? Ask the great god for guidance
Mathematical analysis, this is the solution of the exercise. I don't quite understand. Is o () infinitesimal or infinite? What is the train of thought of this question? Ask the great god for guidance
A big O stands for infinity. For example, O(k) means that when k is infinite, O(k)/k tends to be a non-zero constant, so O(k) is neither an infinite quantity nor an infinite quantity.

The topic is mainly proved by Abel transformation. This series can be written in the form of anbn product. An-an+ 1 = O (1/N 2) is a convergent series, but bn is not clear, so the topic first gives the estimation of the sum of the first n terms of bn, and then directly uses Abel transformation to get the conclusion that the sum of n to n+PaBK is very small when n tends to infinity, thus obtaining convergence.