SOLUTION: what is the sum of the series 6+9+12 ... +30

Question 447497: what is the sum of the series 6+9+12 ... +30
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi

Arithmetic Series d = 3

6+9+12 ... +30



        6+(n-1)*3 = 30  |finding the correct number of terms

            3n = 27

             n = 9 





 = (9/2) * 36 = 162

 

RELATED QUESTIONS

what is the next term in the series: 2, 6, 9, 27, 30,... (answered by oscargut)
What is the sum me the series?... (answered by user_dude2008)
what is the sum of the series... (answered by mathmate)
What is the sum of the first five terms of the series 35 + 30 + 25 +...... (answered by josgarithmetic)
In an arithmetic series the sum of the first 9 terms is 162 and the sum of the first 12... (answered by Theo)
Find the sum of the series... (answered by ikleyn)
The given series has 6 terms. What is the sum of the terms of the series?... (answered by jim_thompson5910,solver91311)
The given series has 6 terms. What is the sum of the terms in the series 5+8+11 . .... (answered by ewatrrr)
What is the sum of 2+4+6+8+10+12 using the formula for the partial sum of arithmetic... (answered by jim_thompson5910)