关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 公告:维护QQ群:833371870,欢迎加入!公告:维护QQ群:833371870,欢迎加入!公告:维护QQ群:833371870,欢迎加入! 2021-04-14 等差数列-10,-6,-2,2,…前___项的和是-18 等差数列-10,-6,-2,2,…前___项的和是-18 答案: 查看 举一反三 下列数列中,是等差数列的是 A: 1,2,4,6,8...... B: 2,-2,2,-2,2...... C: 3,3,0,3,3...... D: 2,5,8,11,14...... 2,-2,2,-2….是一个等差数列 ( ) 下列数列当中是等差数列的是:() A: 1,2,3,5,6,8,··· B: 6,6,6,6,6,6,··· C: 2,4,6,8,10,12,··· D: 2,0,-2,-4,-6,-8,-10,··· 数列-2,-2,-2,-2......不是等差数列 1.数列的通项公式是=-5n -2,则此数列是公差为5的等差数列