freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

顯然非等差數(shù)列(編輯修改稿)

2025-06-03 18:57 本頁(yè)面
 

【文章內(nèi)容簡(jiǎn)介】 a simple formula for an if the first 10 terms of the sequence {an} are 1, 7, 25, 79, 241, 727, 2185, 6559, 19681,59047? Sol: 顯然非等差數(shù)列 後項(xiàng)除以前項(xiàng)的值接近 3 ? 猜測(cè)數(shù)列為 3n ? … 比較: {3n} : 3, 9, 27, 81, 243, 729, 2187,… {an} : 1, 7, 25, 79, 241, 727, 2185,… ? an = 3n 2 , n ? 1 Ch25 ? Summations Here, the variable j is call the index of summation, m is the lower limit, and n is the upper limit. nmmnmjj aaaa ???? ??? ?1Example 10.
點(diǎn)擊復(fù)制文檔內(nèi)容
教學(xué)課件相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
備案圖片鄂ICP備17016276號(hào)-1