Các câu hỏi tương tự
tính S= \(\frac{1}{2.5}+\frac{1}{5.8}+\frac{1}{8.11}+....+\frac{1}{47.50}\)
Tính các tổng sau
a.6/2.5+6/5.8+6/8.11+...+6/44.47+6/47.50
b.1/9.11+1/11.13+...+1/41.43+1/43.45
A=5/2.5+5/5.8+5/8.11+...+5/47.50
Tính:Q=(-1)+(-3)+(-5)+...+(-99)S= 1/2.5+1/5.8+1/8.10+...+1/47.50
Xem chi tiết
A= 1/2.5 + 1/5.8 + 1/8.11 + .....+ 1/150.153
b=1/2.5+1/5.8+1/8.11+...+1/92.95
D=1/2.5+1/5.8+1/8.11+...+1/1979.1982
1/2.5 - 1/5.8 -1/8.11 - ...- 1/302.305
1/2.5+1/5.8+1/8.11+....+1/29.32