+0  
 
0
62
5
avatar+588 

What is the sum of the first 19 terms of the arithmetic series?

3+8+13+18+…

adore.nuk  Mar 6, 2018
Sort: 

5+0 Answers

 #1
avatar
+1

Did my answer ever send?

-Hayley

Guest Mar 6, 2018
 #2
avatar
+1

Correct me if I am wrong, lol. But is it

3,8,13,18,23,28,33,38,43,48,53,58,63?

-Hayley

Guest Mar 6, 2018
 #3
avatar+588 
0

It wasn't correct, but I had already put my answer in and it was right. Thank you so much for the effort though. 

adore.nuk  Mar 6, 2018
 #4
avatar
+1

Im sorry! I am curious though, what was the answer??

-Hayley

Guest Mar 6, 2018
 #5
avatar
+1

Don't you know the formula for Arithmetic Series?

S = N/2 [2F + (N - 1)*D], where N=Mumber of terms, F=First term, D =Common difference

 

S = 19/2 [2*3 + (19 - 1)*5]

S = 9.5 [6 + (18*5) ]

S = 9.5 [6 +  90 ]

S = 9.5 x 96

S = 912

Guest Mar 6, 2018

9 Online Users

avatar
avatar
New Privacy Policy (May 2018)
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  Privacy Policy