Post as a guest Name. Notes Quick Nav Download. In other words, if we multiply a divergent series by a constant it will still be divergent. Sign up using Facebook. In order for a series to be a telescoping series we must get terms to cancel and all of these terms are positive and so none will cancel. From the previous example we know the value of the new series that arises here and so the value of the series in this example is,. In that section we stated that the sum or difference of convergent series was also convergent and that the presence of a multiplicative constant would not affect the convergence of a series. The following series, for example, is not a telescoping series despite the fact that we can partial fraction the series terms.

Due to the nature of the mathematics on this site it is best views in landscape mode. The partial sums are,. This means that it can be put into the form of a geometric series. In other words, if we multiply a divergent series by a constant it will still be divergent. If it converges find its value. In order for a series to be a telescoping series we must get terms to cancel and all of these terms are positive and so none will cancel.

However, we can start with the series used in the previous example and strip terms out of it to get the series in this example. So, cknverge series is convergent because the partial sums form a convergent sequence and diverg value is.

If they converge give the value of the series. If you need a refresher you should go back and review that section. Sammy Black Sammy Black By now you should be fairly adept at this since we spent a fair amount of time doing partial fractions back in the Integration Techniques chapter.

The partial sums are. If it converges, what value does it converge to? Example 4 Determine if the following series converges or diverges. So, what does this do for us? Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

## Telescoping Series

The end result this time is two initial and two final terms are left. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

In this case we are subtracting a finite number from a conerge series. Example 5 Determine the value of the following series.

In this section we are going to take a brief look at three special series. Trlescoping appear to be on a device with a “narrow” screen width i. We will either have infinity minus a finite number, which is still infinity, or a series with no value minus a finite number, which will still have no value.

Consider the following example. Srries are nice ideas to keep in mind. Home Questions Tags Users Unanswered. If your device is not in landscape mode many of the equations will run off the side of your device should be able to scroll to see them and some of the menu items will be cut off due to the narrow screen width. Therefore, this series is divergent.

### Telescoping Series

Bob Shannon Bob Shannon 2 22 How do you determine if a telescoping series is convergent or not? By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

It will be fairly easy to get this into the correct form. In this portion we are going to look at a series that is called a telescoping series. Sign up or log in Sign up using Google. Email Required, but never shown.

However, this does provide us with a nice example of how to use the idea of stripping out terms to our advantage. This can be done using simple exponent properties.

### calculus – Determining if a Telescoping Series is convergent or not – Mathematics Stack Exchange

To see that this series is divergent all we need to do is use the fact that we can factor a constant out of a series as follows. Example 2 Use the results from the previous example to determine the value of the following series.

Sign up using Facebook. This is now a finite value and so this series will also be convergent. Due to the nature of the mathematics on this site it is best views in landscape mode. No need to worry about telescoping anything.

This is the origin of the name telescoping series. The difference of a few terms one way or the other will not change the convergence of a series.

Dverge, special may not be the correct term. If it converges find its value.