\(S=\frac{101}{120}+\frac{1}{2.6}+\frac{1}{4.9}+\frac{1}{6.12}+...+\frac{1}{36.57}\)
tính D=101/120+1/2.6+1/4.9+1/6.12+.......+
1/36.57+1/38.60
2023-1/2.6-1/4.9-1/6.12-...-1/36.57-1/38.60
\(\frac{1}{4.9}+\frac{1}{9.14}+\frac{1}{14.19}+.....+\frac{1}{44.49}\)
Tính tổng \(\frac{1}{1.4}+\frac{1}{4.9}+\frac{1}{9.16}+...+\frac{1}{100.121}\)
B = \(\frac{1}{4.9}+\frac{1}{9.14}+\frac{1}{14.19}+...+\frac{1}{64.69}\)
thực hiện phép tính
C = \(\frac{1+\frac{1}{3}+\frac{1}{3^2}+....+\frac{1}{3^{100}}}{1+\frac{1}{3}+......+\frac{1}{3^{101}}}\)
D = \(\frac{1+\frac{1}{3}+\frac{1}{3^2}+...+\frac{1}{3^{101}}}{1+\frac{1}{3}+........+\frac{1}{3^{102}}}\)
ai lam ho minh voi so sanh nha
Tính:
B = [-2008. 57 + 1004. (-86) : [32. 74] + 16. (-48)
C = 75. (2 - 128) - 128. (-75)
D = \(\left(1-\frac{1}{2}\right).\left(1-\frac{1}{3}\right).\left(1-\frac{1}{4}\right)...\left(1-\frac{1}{2018}\right)\)
E = \(\frac{1}{4.9}+\frac{1}{9.14}+\frac{1}{14.19}+\frac{1}{64.69}+\frac{1}{69}.74\)
Tính giá trị biểu thức:
a) \(A=1+\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+...+\frac{1}{2^{2016}}\)
b) \(B=-\frac{1}{3}+\frac{1}{3^2}-\frac{1}{3^3}+...+\frac{1}{3^{100}}-\frac{1}{3^{101}}\)
c) \(S=\frac{1}{4.7}+\frac{1}{4.7}+...+\frac{1}{2002.2005}\)
d) \(P=\frac{1}{10}+\frac{1}{15}+\frac{1}{21}+...+\frac{1}{120}\)
e) \(Q=\frac{1}{1.2.3}+\frac{1}{2.3.4}+...+\frac{1}{98.99.100}\)
