探索怎么追天秤座女生，解答你的疑惑

探索怎么追天秤座女生，解答你的疑惑

一个身份证可以办几张手机卡

在中国大陆，每个身份证可以办理多张手机卡。根据实际情况，通常可以办理三到五张手机卡，具体数量可能会因地区或运营商政策的不同而有所不同。

巨鹿县将全县城区、农村划分为2800个基础网格，2800余名网格员开展常态化排查，及时上报信息数据，快速传达落实政令要求，助力群众诉求得到高效解决。， 打造一个典型示范县。

微信怎么让电脑单独在线？

微信官方并没有提供电脑单独在线的功能，微信账号绑定手机号后，同一时间只能在线在一个设备上。如果想在电脑上使用微信，可以通过以下两种方式： 1. 使用微信Web版：打开微信官方网页（https://wx.qq.com/），使用手机扫描二维码登录即可，但在这种情况下，手机必须保持在线状态才能正常使用电脑上的微信。 2. 使用安卓模拟器：下载并安装安卓模拟器（如BlueStacks、Nox等），在模拟器中下载并安装微信手机版，然后登录微信即可，但同样需要手机保持在线状态才能正常使用。

让我们期待着RTX5090能够在游戏性能和视觉效果方面带来更多的突破和创新。，校园内，疾控专家通过展板、宣传册等宣传资料向师生们科普预防艾滋病知识。

(1-1/2)+(1/2-1/3)+(1/3-1/4)+···+（1/2009-1/2010

To find the sum of the given series, we need to add all the terms together. (1 - 1/2) + (1/2 - 1/3) + (1/3 - 1/4) + ... + (1/2009 - 1/2010) We can simplify each term by finding the common denominator. 1 - 1/2 = 2/2 - 1/2 = 1/2 1/2 - 1/3 = 3/6 - 2/6 = 1/6 1/3 - 1/4 = 4/12 - 3/12 = 1/12 We can observe that each term follows this pattern - the denominator of the second fraction becomes the denominator of the first fraction in the next term. So, the series can be written as: 1/2 + 1/6 + 1/12 + ... + 1/2009 To find the sum of this series, we need to find the common denominator of all the fractions. The common denominator of 2, 6, 12, ..., 2009 will be the least common multiple (LCM) of these numbers. Calculating the LCM of these numbers is a bit lengthy. Instead, we can find the LCM of 2, 3, 4, ..., 2010, and then divide by the LCM of 2, 3, 4, ..., 2009. LCM(2, 3, 4, ..., 2010) / LCM(2, 3, 4, ..., 2009) = 2010 / 2 = 1005 So, the common denominator is 1005. To add the fractions, we need to express them with the common denominator: 1/2 = (1/2) * (1005/1005) = 1005/2010 1/6 = (1/6) * (1005/1005) = 167.5/2010 1/12 = (1/12) * (1005/1005) = 83.75/2010 Now we can add: 1005/2010 + 167.5/2010 + 83.75/2010 + ... + 1/2009 We can observe that the denominators of the fractions form an arithmetic sequence, and the numerators follow the same pattern. Using the formula for the sum of an arithmetic sequence: Sum = (first term + last term) * number of terms / 2 In this case, the first term is 1005/2010, the last term is 1/2009, and the number of terms is 2010. Sum = (1005/2010 + 1/2009) * 2010/2 Sum = (1005/2010 + 1/2009) * 1005 Sum = (1005 * 2009 + 1 * 2010) / 2 Sum = (2019955 + 2010) / 2 Sum = 2021965 / 2 Sum = 1010982.5 Therefore, the sum of the given series is 1010982.5.

本文共有73人参与回答，点击这里发表你的个人建议吧！