SOLUTION: Find the sum of the first 220 positive even integers. A)48,180 B)48,620 C)48,841 D)48,400

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Find the sum of the first 220 positive even integers. A)48,180 B)48,620 C)48,841 D)48,400      Log On


   

Question 741211: Find the sum of the first 220 positive even integers.
A)48,180
B)48,620
C)48,841
D)48,400
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
a=2,d=2
n=220
Sn=n/2[2a+(n-1)d]

=220/2[2*2+(220-1)*2]

=110
=110*442
=48620