数列{an}满足an+1+(-1)^nan=2n-1,则{an}的前40项和为________.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 17:34:11
![数列{an}满足an+1+(-1)^nan=2n-1,则{an}的前40项和为________.](/uploads/image/z/11720843-35-3.jpg?t=%E6%95%B0%E5%88%97%7Ban%7D%E6%BB%A1%E8%B6%B3an%2B1%2B%28-1%29%5Enan%3D2n-1%2C%E5%88%99%7Ban%7D%E7%9A%84%E5%89%8D40%E9%A1%B9%E5%92%8C%E4%B8%BA________.)
xTMOA+ݕ`لOh3KL{l, (JV6"6T@>?;'Bف ޙyM-ͱs#lpw$-!)BVLW]t+k6MyKsg6{rY
sD 'BF2%a]&BtlĔ-$bb[&D!9&ƶu7,*
k!$gjLlX iTI!%2BQwPNOݞS:^K/h}^|29_1yg_WYI(ep TG ҵS=x ChRs 7#T4n$'
k
J]"
ZH^.BڢbacQA^KU9 %5n`ϊdxhCv
tɚ$4:*\fϖ151E7Շ(l1#)9a$1
ReZeE L! N
G!L+6qmF(5n(5*)JPB)ٓSRtRNvh66