
2021衡中同卷调研卷理综一,目前我们已经整理了2021衡中同卷调研卷理综一的各科答案和试卷,更多衡中同卷调研卷请关注本网站。
17.解:(1)因为an=(Sn-3n 4),所以 an 1=23 (Sn 13n 1),
Warning: file_get_contents(/www/wwwroot/guanli.daanjiexi.com/https://...@!dafweruwerhwerw): failed to open stream: No such file or directory in /www/wwwroot/guanli.daanjiexi.com/ocr/tikuocr.php on line 19