TÍnh
S=1+1/2(1+2)+1/3(1+2+3)+1/4+(1+2+3+4)+.....+1/2017(1+2+3+...+2017)
Tính S = 1 + \(\frac{1}{2}\).(1+2) + \(\frac{1}{3}\).(1+2+3) + \(\frac{1}{4}\).(1+2+3+4) + .... + \(\frac{1}{2017}\).(1+2+3+....+2017)
Tính tổng:
\(S=\frac{1}{1+2}+\frac{1}{1+2+3}+\frac{1}{1+2+3+4}+...+\frac{1}{1+2+3+4+...+2016+2017}\)
tính m=2016+2016/2+2015/3+2014/4+...+1/2017/1/2+1/3+1/4+...+1/2017
Cho biểu thức : B = 2017+2017/1+2+2017/1+2+3+2017/1+2+3+4+....+2017/1+2+3+...+2012
1+1/2×(1+2)+1/3×(1+2+3)+1/4×(1+2+3+4)+....+1/2017×(1+2+3+....+2017)
Tính :
S1= 1-2+3-4+....................+2017-2018
S2= 1-4+7-10+..............+2015-2018
S3= 1+2-3-4+.....................+2015+2016-2017-2018
Giup minh voi minh dang can gap nha
ai nhanh ma dungthi minh tich cho nha
A= ( 1/2017+ 2/2016+ 3/2015+...+ 2015/3+ 2016/2+ 2017) : ( 1/2+1/3+1/4+...+1/2017+1/2018)
S=1+2+...+2^2017
S=3+3^2+...+3^2017
S=4+4^2+...+4^2017
S=5+5^2+...+5^2017
ai làm xong nhanh nhất mình tặng tích cho càng nhanh càng tốt.