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How is the sum expressed in sigma notation?

 

11 + 17 + 23 + 29 + 35 + 41

 Jan 11, 2020
 #1
avatar+107405 
+1

We have

 

6

∑   5  + 6n

n = 1

 

When

n = 1   we have  11

n = 2  we have 17  

And we are summing these through n   = 6   ( = 41  )

 

Note :  This  is not unique.....there are  other ways, as  well, depending upon our starting value for n

 

Another possibility is

 

5

∑  11 + 6n

n = 0

 

Hope that helps !!!!

 

cool cool cool

 Jan 11, 2020
 #2
avatar
0

Instead of n=1 wouldn't it be 

5

∑ 

i=1  ?

Guest Jan 11, 2020
 #3
avatar+107405 
0

You  can use  any letter you like for the  index   ( and function)

 

"i"  is as good as "n"

 

cool cool cool

CPhill  Jan 11, 2020

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