SigmaPractise using the sigma notation to find the sum of various number series 
This is level 2: determine whether a series is arithmetic or geometric. The first question has been done as an example. You will be awarded a trophy if you get at least 5 correct and you do this activity online.
InstructionsTry your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help. When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file. 



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Level 1  Write out the terms of the series defined by the sigma expression
Level 2  Determine whether a series is arithmetic or geometric
Level 3  Evaluate the sums of the series
Exam Style Questions  A collection of problems in the style of GCSE or IB/Alevel exam paper questions (worked solutions are available for Transum subscribers).
Sequences  A list of resources including lesson Starters, visual aids, investigations and selfmarking exercises.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
See the National Curriculum page for links to related online activities and resources.
Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can doubleclick the 'Check' button to make it float at the bottom of your screen.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
Some calculators have a sigma function. The image below shows the function on a TINspire calculator. This function would be useful to calculate the answers to the questions in Level 3 but as you can see from Level 1 and Level 2 it is easy to find questions involving the sigma notation that cannot be answered with the help of the calculator.
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