圆的半径扩大5倍，面积会扩大25倍．______． 发布时间：2017-07-01 20:44 │ 来源：www.tikuol.com 题型：解答题 问题： 圆的半径扩大5倍，面积会扩大25倍．______．
题型：解答题 完形填空。 James Naismith came from 1 . He 2 basketball in 1891. At that time,he was a P. E teacher. He invented an 3 game for his students 4 they could play 5 in bad weather. Do you know 6 to score in the game? Well,just put the ball into 7 side's basket. You van throw the ball into the basket from 8 part of the court and you can throw it with one hand 9 both hands. But you must 10 the rules. Now,more and more people love this game. ( )1.A. Canadian ( )2.A. invents ( )3.A. indoors ( )4.A. because ( )5.A. even ( )6.A. what ( )7.A. other ( )8.A. a ( )9.A. and ( )10.A. think B. Canada B. plays B. outdoor B. when B. ever B. how B. the other B. some B. or B. learn C. American C. invented C. basketball C. if C. only C. where C. another C. many C. but C. know D. America D. played D. funny D. so that D. however D. why D. other's D. any D. with D. follow 查看答案
题型：解答题 已知数列{an}的前n项和为Sn，且Sn=12an•an+1(n∈N*)，其中a1=1，an≠0．（Ⅰ）求数列{an}的通项公式；（Ⅱ）设数列{bn}满足(2an-1)(2bn-1)=1，Tn为{bn}的前n项和，求证：2Tn＞log2（2an+1）n∈N． 查看答案