A=1/1x2+1/2x3+1/3x4+1/4x5+...+1/49x50+1/50x51
A=2-1/1x2+3-2/2x3+4-3/3x4+...+50-49/49x50+51-50/50x51
A=1-1/2+1/2-1/3+1/3+1/4+...-1/49+1/49-1/50+1/50-1/51
A=1-1/51
A=51/51-1/51
A=50/51
tick nha
Tính A = 1/2 + 1/6+ 1/12 + 1/20 + ...+ 1/2450 + 1/ 2550
Tính A=1/2+1/6+1/12+1/20+...+1/2450+1/2550
Tính A= 1/2+ 1/6+ 1/12+1/20+....+1/2450+1/2550.
Tính a biết a= 1/2 +1/6+1/12+1/20....+1/2450+1/2550
tính A biết
A =1/2+1/6+1/12+1/20+...+1/2450+1/2550
Tính A = 1/2 + 1/6 + 1/12 + 1/20 + ... 1/2450+ 1/2550
Nhanh giùm mk nhé
A = 1/2 + 1/6 + 1/12 + 1/20 + ... + 1/2450 + 1/2550
Tìm A biết A băng 1/2 + 1/6 + 1/12 + 1/20 + ..... + 1/2450 + 1/ 2550
Tính A = 1/2 + 1/6 + 1/12 + 1/20 + ... + 1/2450 + 1/2550
Viết cả lời giải ra
Nhanh giùm mk nha
