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Find the sum of the series

15

∑(2n-1)

n=1

 Mar 23, 2019
 #1
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∑[(2n - 1), n, 1, 15] = 225

 Mar 23, 2019
 #2
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Notice that this is just the sum of the first15 odd numbers. Because the sum of the first n is n^2, the answer is 15^2 = 225.

 Mar 23, 2019
 #3
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Jazmin may not have any idea what this notation really means.

 

Maybe one of you might like to explain it to her?  

Melody  Mar 24, 2019
 #4
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Of couse Jasmin could make another post on this thread and ask for an explanation if she actually wants one. 

 

Do you want one Jasmin?

Melody  Mar 24, 2019

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