激情褪去，40岁女性如何经营婚姻？-专业问答网站，解答疑惑

激情褪去，40岁女性如何经营婚姻？-专业问答网站，解答疑惑

(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.

此方案不仅可以恢复患者口腔功能，更能恢复患者的容貌。，经受过军营历练的退役军人，坚守爱与信仰的本色，把不怕吃苦、勇于拼搏的好思想好传统带到退役后的工作生活当中，在各自岗位上展现忠诚的崇高品格。

谁写的部队打油诗，真是太有才了，这不是真的

部队打油诗的创作往往是由士兵或军队相关人员自己创作，以表达他们对军人生活和军队精神的理解和赞美。因此，无法确定具体是谁写的，也没有一个特定的人是"创作部队打油诗"的代表。可以说，部队打油诗的创作是集体智慧的结晶，代表着军人的独特思想和幽默感。

“这个选择同样是跟着国家政策走，两岸融合发展是必然趋势，台湾青年在这里大有可为，国家也重视。，

婴儿护肤品有哪些牌子值得推荐？

以下是一些值得推荐的婴儿护肤品牌： 1. 妮维雅（Nivea）: 这是一家知名的护肤品牌，它的婴儿系列产品温和，不含致敏成分。 2. 雅漾（Avène）：雅漾的婴儿护肤品适用于敏感肌肤，成分天然，温和而有效。 3. 资生堂（Shiseido）：资生堂的婴儿护肤品在市场上广受好评。该品牌专注于温和、安全的配方。 4. 幽兰黛尔（Aveeno）：该品牌注重天然成分，在婴儿肌肤护理领域有较高的专业知名度。 5. 宝宝防止哺乳疹润肤露（Johnson's Baby）：这是一家历史悠久的品牌，其产品以温和性和安全性而闻名。 6. 珍琳（Mustela）：该品牌专注于婴儿护理产品，采用天然成分，滋润效果好。 请注意，每个婴儿的皮肤可能有不同的需求，所以在选择护肤品时，最好先进行肤质测试，并在儿科医生的建议下选择最适合的品牌和产品。

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