... (1+x) 2011 = 20112 011 2011 20102010 2011 22 2011 1 2011 0 2011 xCxCxCxCC +++++ 0,25 Chọn x = -1 ta có: 2011 2011 3 2011 1 2011 2010 2011 2 2011 0 2011 CCCCCC +++=+++ Chọn x = 1 ta có: 20112 011 2011 2 2011 1 2011 0 2011 2 ... 2011! S= ! 1 ! 2010 !2011 ! 3 ! 2008 !2011 ! 2005 ! 6 !2011 ! 2007 ! 4 !2011 ! 2009 ! 2 !2011 +++++ = 2010 2011 2008 2011 6 2011 4 2011 2 2011 CCCCC +++++ 0,25 Khai triển (1+x) 2011 = 20112 011 2011 20102010 2011 22 2011 1 2011 0 2011 ... 20112 011 2011 2 2011 1 2011 0 2011 2 =++++ CCCC 0,25 III Do ñó: 20102010 2011 4 2011 2 2011 0 2011 2 =++++ CCCC Vậy S = ! 2011 12 2010 − 0,25 http://ebook.here.vn – Download Bài...
Ngày tải lên: 21/07/2014, 23:21
Đề thi thử Đại học tiếng Anh khối D năm 2011
... needed B. for our needs C. the thing needed D. that is needed Question 29: He said that the plane had already left and that I…………………an hour earlier. A. Must have arrived C. should have arrived ... reason C. turned C. push C. imagining C. brings C. due to C. shows C. taking D. nearly D. saying D. conclusion D. carried D. keep D. solving D. causes D. as well as D. serves D. stopping Read the following ... guests food and drinks. B. The hostess tried hard to please her guests. C. The guests refused the food and drinks prepared by the hostess. D. Neither the guests nor the hostess had food or drinks....
Ngày tải lên: 02/10/2012, 12:02