Các câu hỏi tương tự
so sánh
a)A=1/2^1+1/2^2+1/2^3+...+1/2^49+1/2^50 với 1
b)B=1/3^1 +1/3^2+1/3^3...+1/3^99+1/3^100 với 1/2
c)C=1/4^1+1/4^2+1/4^3+...+1/4^999+1/4^1000 với 1/3
2023-1/2*(1+2)-1/3*(1+2+3)-1/4*(1+2+3+4)-...-1/2022*(1+2+3+4+...+2022)
1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+...+1/20(1+2+3+4+...+20)
1 - 1/2 + 2 - 2/3 + 3 - 3/4 + 4 - 1/4 - 3 - 1/3 - 2 - 1/2 - 1
1 -1/2 + 2 -2/3 + 3 -3/4 + 4 -1/4 -3 -1/3 -2 -1/2 -1
1-1/2+2-2/3+3-3/4+4-1/4-3+1/3-2-1/2-1
1-1/2+2-2/3+3-3/4+4-1/4-3-1/3-2-1/2-1
3 tháng 5 2016 lúc 20:01
1+ 1/2(1+2) +1/3(1+2+3)+1/4(1+2+3+4)+...+1/20(1+2+3+4+5+...+20)
Tính: A = 1/2 + 1 + 1/2(1+2) + 1/3(1+2+3) + 1/4(1+2+3+4) + ... + 1/199(1+2+3+4+...+199)