G= 1.3+2.4+3.5+....+97.99+98.100
1.3+2.4+3.5+...+97.99+98.100
1.3+2.4+3.5+...+97.99+98.100
Tính 1.3+2.4+3.5+...+97.99+98.100
1.3 + 2.4 + 3.5 + 4.6 +.........+ 97.99 + 98.100
tính nhanh:1.3+2.4+3.5+.....+97.99+98.100
1/1.3-1/2.4+1/3.5-1/4.6+...+1/97.99-1/98.100 = ?
1/1.3+1/2.4+1/3.5+....+1/97.99+1/98.100 <3/4
TÍNH: a. \(1.3+3.5+....+97.99\)
b.\(1.3+2.4+3.5+....+98.100\)
c.\(2.4+4.6+....+98.100\)