+0  
 
0
38
1
avatar

How is the sum expressed in sigma notation?

13 + 21 + 29 + 37 + 45

Enter your answer by filling in the boxes.

 

\(\sum_{i=1}^{5}\)(        )

 Apr 24, 2020
 #1
avatar+21017 
+1

The numbers increase by 8 each time; this is the slope so the formula will have the form 8i + .

 

To find the , put in 1 for i and see that your answer is 8, not 13; so, you will need 5 more.

[This is also true if you put in2 for i and see that your answer is 16, not 21.]

 

So, the formula is:     8i + 5

 Apr 24, 2020

13 Online Users

avatar
avatar
avatar
avatar