gmat数学求解1. for any positive integer n, the sum of the first
gmat数学求解
1. for any positive integer n, the sum of the first n positive integers equals [n(n+1)]/2. what is the sum of all the even integers between 99 and 301?
A 10,100
B 20,200
C 22,650
D 40,200
E 45,150
1. for any positive integer n, the sum of the first n positive integers equals [n(n+1)]/2. what is the sum of all the even integers between 99 and 301?
A 10,100
B 20,200
C 22,650
D 40,200
E 45,150
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