2/3 + 2/15 + 2/35 + ..... + 2/9999
Tính nhanh A= 2/3 + 2/15 + 2/35 + 2/36 + 2/99 + ...... + 2/9999
tính nhanh
C=1-(2/3+2/15+2/35+...+2/9999)
\(B=\frac{2}{3}+\frac{2}{15}+\frac{2}{35}+\frac{...2}{9999}=?\)
Tính M= 2/3+14/15+34/35+62/63+...+9998/9999
Tính tổng: A =-2/15+-2/35+-2/63+-2/99+...+-2/9999
tính bằng cách hợp lí;
1] 2/3+14/15+34/15+...+9998/9999
2](1/1.300+1/2.301+11/13.302+..+1/101.400):(1/1.102+1/2.103+...+1/299.400)
-2/15+-2/35+-2/63+-2/99+......+-2/9999. giải giúp mình nha, tick đó
B = 2/3 + 2/15 + 2/35 + ......... + 2/9999 + 2/10403. C = 3/2 + 2/8 + 3/24 + ......... + 3/9800 + 3/10200. Các Bạn Jup Mình vs