求问一道GRE数学题S is the sum of the first n negative integer power

求问一道GRE数学题S is the sum of the first n negative integer power 一道Gmat数学题!For any positive integer n,the sum of the first n 一道gre数学题n is an even integer and a multiple of 3 .The remain 英语翻译For any positive integer n,the sum of the first n positi For any positive integer n,the sum of the first n positive i 一道英语的数学题. The least integer of consecutive integers is -25.I If“m”is an even integer ,then the following is the sum of th the sum of the first n odd integers 翻译if an integer is three times as large as the sum of the fi This is the first sum of money ___ the children's family has 一道数学题.find the sum of the n consecutive geometric terms whic what is the sum of the first five prime numbers