What is the Ratio Test(一)

作者：梁宇学

来源：中学生数学, 2018, (07): 35-36.

• What is the Ratio Test

<正>Let’s recall that if a series is absolutely convergent then we will also know that it’s convergent and so we will often use it to simply determine the convergence of a series.Now we will start to learn a new and very useful test named the Ratio Test.The Ratio Test Suppose we have the series ∑an.And let

• 单位
  首都师范大学