tìm x biết 1/2+1/6+1/12+...+1/x.(x+1)=2015/2016
hậu duệ mặt trời giúp mk đi
Tìm x thuộc Z biết:
1) 2016+2015+2014+...+x = 2016
2) 1+2+3+...+x = 1275
3) | x+2015 | + | x+2016| = 1
Tìm số tự nhiên x , biết rằng:
1/2+1/6+1/12+1/20+...+1/x(x+1)=2015/2016
1/2+1/6+1/12....+1/x(x+1)=2015/2016
Tìm x : ( x + 1 ) + (x + 2 ) + ( x + 3 ) + .... + ( x + 2015 ) = 2015 . 2016
1/2+1/6+1/12+1/20+...+1/x[x+1]=2015/2016
tim x
1/2+1/6+1/12+1/20....+1/x(x+1)=2015/2016
1/2+1/6+1/12+1/20+...+1/x(x+1)=2015/2016