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Các câu hỏi tương tự
\(\frac{5}{3.5}+\frac{5}{5.7}+...+\frac{5}{29.31}\) \(\frac{5}{3.5}+\frac{5}{5.7}+...+\frac{5}{29.31}\) \(\frac{3}{2.3}+\frac{3}{3.4}+...+\frac{3}{15.16}\)
Tính :
\(S=\frac{5}{1.3}+\frac{5}{3.5}+\frac{5}{5.7}+\frac{5}{7.9}+...+\frac{5}{17.19}\)
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
\(\frac{5}{3.5}+\frac{5}{5.7}+\frac{5}{7.9}+....+\frac{5}{95.97}\)
GIÚP MÌNH NHANH NHA!!! :3
Tim gia tri cua cac bieu thuc sau
B= \(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+...+\frac{2}{37.39}\)
C= \(\frac{5}{4.5}+\frac{5}{5.6}+\frac{5}{6.7}+...+\frac{5}{99.100}\)
M = \(\frac{1}{3.5}+\frac{1}{5.7}+\frac{1}{7.9}+\frac{1}{9.11}+\frac{1}{11.13}\)
a,\(\frac{-5}{9}+\frac{8}{15}+\frac{-2}{11}+\frac{4}{-9}+\frac{7}{15}\)
b,\(\frac{5}{13}+\frac{-5}{17}+\frac{-20}{41}+\frac{8}{13}+\frac{-21}{41}\)
c,\(\frac{1}{5}+\frac{-2}{9}+\frac{-7}{9}+\frac{4}{5}+\frac{16}{17}\)
d,\(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+......+\frac{2}{99.101}\)
TÍNH
Q = \(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}\)