【单选题】We must keep up with the times by absorbing new information.Otherwise,We will be _____ by those with up-to-date knowledge.
【简答题】已知数列 是一个公差大于0的等差数列,且满足 , . (Ⅰ)求数列 的通项公式; (Ⅱ)若数列 和数列 满足等式: = ,求数列 的前n项和
【简答题】To keep up with the pace of globalization, we must keep ourselves ________ ( 具备) a good command of English.
【单选题】We must keep up with the times by absorbing new information.Otherwise,we will be by those with up-to-date knowledge.
【简答题】已知数列 是一个公差不为0等差数列,且 ,并且 成等比数列,则 =________.
【单选题】The support of the students ______ the losing team and they played harder, so in the end they won the game.
【单选题】The support of the students _____________ the losing team and they played harder, so in the end they won the game.
【简答题】已知数列 的前 项为 、 、 、 、 ,据此可写出数列 的一个通项公式为____.
【简答题】已知数列1, , , ,…的一个通项公式是a n =_________.