0,6-3\25-3\125-3\625
0,8-4\25-4\125-4\625
Tính tổng:a)3+3/5+3/25+3/125+3/625
b)M=4/3.7+4/7.11+4/11.15+...+8/95.99
c)N=1/2+1/6+1/12+1/20+...+1/90
625 : 5 mũ 3
<5x-10>^3=625^3:125
9^14*25^3*8^7/18^12*625^3*24^3
(2x-3)^2=625
3/4.8/9.....624/625
128:4 + 625 : 125 - 3 x 32
A=3/5+3/25+3/125+3/625 tính nhanh.
giup minh di nhe