Tính :
E=1/1.6+1/6.11+1/11.16+...+1/496.501
Tính tổng:
A = 1/ 1.2 + 1/ 2.3 + ... + 1/ 999.1000
B = 1/ 1.6 + 1/ 6.11 + .... + 1/ 496.501
C = 1/ 1.2.3 + 1/ 2.3.4 + ..... + 1/ 998.999.1000
S=1/1.6+1/6.11+1/11.16+.....+1/496.501
S = 1/1.6+1/6.11+1/11.16+...+1/496.501
Tính A= \(\frac{1}{1.6}+\frac{1}{6.11}+\frac{1}{11.16}+.....+\frac{1}{496.501}\)
\(A=\dfrac{1}{1.6}+\dfrac{1}{6.11}+\dfrac{1}{11.16}+...+\dfrac{1}{496.501}\)
\(\frac{1}{1.6}\)+\(\frac{1}{6.11}\)+.........+\(\frac{1}{496.501}\)
tính hợp lý nếu có thể:
Tính nhanh: B= \(\frac{1}{1.6}\)+\(\frac{1}{6.11}\)+\(\frac{1}{11.16}\)+...+\(\frac{1}{496.501}\)
Bai 1 Tinh tong
F=5^2/1.6+5^2/6.11+5^2/11.16+...+5^2/496.501
Ai tra loi nhanh cau hoi nay minh se tick cho ban do nhoi ghi loi giai day du
