Math 11 Edublog post #1

This week I learned a lot of new things but one that stood out was finding out how to add up all the numbers in a arithmetic sequence. The formula we use is below.

S_n=(t_1+t_n)\cdot (n\div2)

In a sequence such as 1,3,5,7,9 to findĀ S_{23} you would have to use the above equation as well as and equation to findĀ t_{23} the solution is as follows in the picture of my work.

 

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