1.3 + 2.4 + 3.5 + 4.6 +.........+ 97.99 + 98.100
1/1.3-1/2.4+1/3.5-1/4.6+...+1/97.99-1/98.100 = ?
Tính
\(S=1.3+2.4+3.5+4.6+....+97.99+98.100..\)
chứng minh rằng:1/1.3 + 1/2.4 + 1/3.5 + 1/4.6 +....+ 1/97.99 + 1/98.100 < 3/4
1.3+2.4+3.5+...+97.99+98.100
Tính 1.3+2.4+3.5+...+97.99+98.100
tính nhanh:1.3+2.4+3.5+.....+97.99+98.100
1.3+2.4+3.5+...+97.99+98.100
chứng minh rằng 1^1.3 + 1^2.4 + 1^3.5 + 1^4.6 +...+ 1^97.99+ 1^98.100 < 3^4