Các câu hỏi tương tự
B =2-4-6+8+10-12-14+.... -2014+2016+2018-2020
Tính nhanh tổng sau :
2+4-6-8+10+12-14-16+18+...+2012-2014-2016+2018+2020
1+2-3-4-5+6+7-8-9-10+11+12-13-14-15+...+2011+2012-2013-2014-2015+2016+2017-2018-2019-2020 giup mik v
A=2-4-6+8+10+12+...-2014-2015+2016
A=-1-2+3+4-5-6+7+8-9-10+11+12-.. ..-3013-2014+2015+2016
A=1-2+3+4-5-6+7+8-9-10+11+12-...-2014+2015+2016
tính : 1 + 2 - 3 -4 + 5 + 6 - 7 - 8 + ... + 2013 + 2014 - 2015 - 2016 + 2017 + 2018
A= -1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
A=1-2+3+4-5-6+7+8-9-...+2007+2008-2009-2010
B=-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
C=(2+4+6+8+...+2014)-(3+5+7+9...+2011)