Các câu hỏi tương tự
A=7/10.11+7/11.12+7/12.13+...+7/69.70
B=1/25.27+1/27.29+1/29.31+...+1/73.75
tính:
1/25.27+1/27.29+1/29.31+...+1/73.75
4/2.4 + 4/4.6 +4/6.8 +...+ 4/2008.2010
1) A = 7/ 10.11 + 7/ 11.12 + 7/ 12.13 + .... + 7/69.70
2 ) B = 1/ 25.27 + 1/ 27.29 + 1/29.31+ ......+ 1/ 73.75
Tính:
\(A=\frac{1}{25.27}+\frac{1}{27.29}+\frac{1}{29.31}+...+\frac{1}{73.75}\)
Bài 6: Tính các tổng sau:
A= \(\dfrac{7}{10.11}\)+\(\dfrac{7}{11.12}\)+\(\dfrac{7}{12.13}\)+...+\(\dfrac{7}{69.70}\)
B= \(\dfrac{1}{25.27}\)+\(\dfrac{1}{27.29}\)+\(\dfrac{1}{29.31}\)+...+\(\dfrac{1}{73.75}\)
B=1/25.27+1/27.29+1/29.31+......+1/73.75
F=4/2.3+4/4.6+4/6.8+.....+4/2008.2010
Tính tổng đó nha các bạn
A=15/90.94+15/94.98+15/98.102+....+15/146.150
B=10/56+10/140+10/260+...+10/1400
C=1/25.27+1/27.29+1/29.31+.....+1/73.75
Tính các tổng sau :
a) F = 1/25.27 + 1/27.29 + 1/29.31 + ... + 1/73.75
b) G = 15/90.94 + 15/94.98 + 15/98.102 + ... + 15/146.150
c) H = 10/56 + 10/140 + 10/260 + ... + 10/1400