Các câu hỏi tương tự
TÍNH
Q = \(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}\)
M = \(\frac{1}{3.5}+\frac{1}{5.7}+\frac{1}{7.9}+\frac{1}{9.11}+\frac{1}{11.13}\)
B=\(\frac{2}{3.5}\)+\(\frac{2}{5.7}\)+ \(\frac{2}{7.9}\) + \(\frac{2}{9.11}\)
GIÚP MÌNH NHA
CẢM ƠN TRƯỚC NHÉ
\(D=\frac{5}{3.5}+\frac{5}{5.7}+\frac{5}{7.9}+\frac{5}{9.11}+....\frac{5}{27.29}+\frac{5}{29.31}\)= ?
1, Tính giá trị biểu thức
\(A=\frac{5}{1.2}+\frac{5}{2.3}+.......+\frac{5}{99.100}
\)
\(B=\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+\frac{1}{5.6}+\frac{1}{6.7}+\frac{1}{7.8}+\frac{1}{8.9}+\frac{1}{9.10}\)
\(C=\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}+\frac{2}{11.13}+\frac{2}{13.15}\)
1, Tính gái trị biểu thức
\(A=\frac{5}{1.2}+\frac{5}{2.3}+......+\frac{5}{99.100}\)
\(B=\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+\frac{1}{5.6}+\frac{1}{6.7}+\frac{1}{7.8}+\frac{1}{8.9}+\frac{1}{9.10}\)
\(C=\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}+\frac{2}{11.13}+\frac{2}{13.15}\)
Tính nhanh :
\(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+....+\frac{2}{95.97}+\frac{2}{97.99}\)
TÍNH NHANH
A=\(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+...+\frac{2}{25.27}\)
Tính
M = \(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+...+\frac{2}{97.99}\)