Các câu hỏi tương tự
1/2+1/14+1/35+1/65+1/104+1/152 = ?
1/2+1/14+1/35+1/65+1/104+1/152
1/2+1/14+1/35+1/65+1/104+1/152
Tính:
a) C = 3/1.3 + 3/3.5 + 3/3.7 +...+ 3/49.51
b) D = 1/2 + 1/14 + 1/35 + 1/65 + 1/104 + 1/152
a=1/2+1/14+1/35+1/65+1/104+1/152
tìm S= 1/2 +1/14 + 1/35+ 1/ 65+ 1/104+ 1/152
Tính A=1/2+1/14+1/35+1/65+1/104+1/152
1 Tính nhanh:
a. 1/15+1/35+1/63+1/99+1/143
b. 1/2+1/14+1/35+1/65+1/104+1/152
2 Chứng minh: D=(1/2)^2 +(1/3)^2 +(1/4)^2 +....+(1/10)^2 bé hơn 1
Tính nhanh :1/2+1/14+1/35+1/65+1/104+152