a) A=1+1/5+1/25+1/125+1/625+...+1/78125
b)B=1/3+1/12+1/48+1/192+1/768+...+1/36864
c)C=5/3+5/6+5/12+5/24...+5/192+5/384
GIÚP MÌNH VỚI XIN MỌI NGƯỜI AI GIÚP MÌNH THÌ MÌNH CHO TICK LÀM TẤT CẢ MỌI THỨ
BÀI TÍNH NHANH
A.2/3+2/6+2/12+2/24+2/48+2/96+2/192
B.1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
C.1/3+1/9+1/27+1/81+1/243+1/729
D.3/2+3/8+3/32+3/128+3/512
E.3+3/5+3/25+3/125+3/625
A=1/3 + 1,6 + 1/12 + 1/24 + 1/48 + 1/96 B=(1+3+5+7......+2011+2013) nhân (125 nhân 125 nhân 127 -127 nhân 127 nhân 125
A = 1/3 + 1/6 + 1/12 + 1/24 + 1/48 + 1/96 + 1/192 + 1/384 + 1/768 +1/1536
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
1/3+1/6+1/12+1/24+1/48+1/96
A= 1/3 + 1/6 + 1/12 + 1/24 + 1/48 + 1 /96 + 1/192