等比数列求和公式的几种推导

2025-03-12 09:21:43
推荐回答(1个)
回答1:

http://wenku.baidu.com/link?url=COxDlJoZDOw8NjlLu9BA8v2zwGTt0aOHg0EP-ZDxFr-eWIqK8KZyzeUMPzYXJXDWUwf9plBZKHUm4SyE4mzshl-Hol8u4U1zE5wykWquZbq