tính nhanh
5/3+5/12+5/48+5/192+5/768+5/3072
Tính: 5/3+5/12+5/48+....+5/768+5/3072
A=1/3+1/6+1/12+1/24+1/48+1/96+1/192
2/3+2/6+2/12+2/24+2/48+2/96+2/192=?
1/3 + 1/6 + 1/12 + 1/24 + 1/48 + 1/96 + 1/192 + 1/384 =
2/3 + 2/6 + 2/12 + 2/24 + 2/48 + 2/96 + 2/192 =
Tinh nhanh\(\frac{2014X2015+1024}{2014X2016-1000}\)
tinh gia tri
-1-1/2-1/4-1/8-....-1/1024
nhanh nhanh gium ai dung thi tick