SOLUTION: how do i find the sum of the numbers 2 + 4 + 6 +....+ 96 + 98 without adding each number up individually?

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Question 346329: how do i find the sum of the numbers 2 + 4 + 6 +....+ 96 + 98 without adding each number up individually?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
This is an arithmetic sequence.
S[n]=n/2(a[1]+a[n]) where n is the number of terms, s=sum, a=a term of the sequence.
n=98/2=49
S=49/2(2+98)
=49/2 * 100
=4900/2
=2450
.
Ed