SOLUTION: find the sum of the first 19 terms of the arithmetic series in which a1=2 and d=4. thanks i hope you can help!

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Question 51746: find the sum of the first 19 terms of the arithmetic series in which a1=2 and d=4.
thanks i hope you can help!
Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
find the sum of the first 19 terms of the arithmetic series in which a1=2 and d=4.
thanks i hope you can help!
formula is
sn = (n/2){2a+(n-1)d}
n=19.............a=2........d=4.so
s19= (19/2){2*2+(19-1)4}=19*76/2=19*38=722