Kudo Shinichi mik sẽ biết ơn ai giải cho mik nhìu nhìu
Kudo Shinichi mik sẽ biết ơn ai giải cho mik nhìu nhìu
A= \(\frac{1}{2.4}-\frac{1}{3.5}+\frac{1}{4.6}-\frac{1}{5.7}+.....-\frac{1}{97.99}+\frac{1}{96.98}-\frac{1}{97.99}\)
Tính nhanh:\(\left(1+\frac{1}{1.3}\right).\left(1+\frac{1}{2.4}\right).\left(1+\frac{1}{3.5}\right).\left(1+\frac{1}{4.6}\right).....\left(1+\frac{1}{8.10}\right)\)
Chứng minh rằng: \(\frac{1}{1.3}+\frac{1}{2.4}+\frac{1}{3.5}+\frac{1}{4.6}+...+\frac{1}{97.99}+\frac{1}{98.100}< \frac{3}{4}\)
\(\left(1+\frac{1}{1.3}\right)\left(1+\frac{1}{2.4}\right)\left(1+\frac{1}{3.5}\right)\left(1+\frac{1}{4.6}\right)...\left(1+\frac{1}{2013.2015}\right)\)
Hãy tính giá trị biểu thức
Thực hiện phép tinh sau:
\(\frac{1}{1.3}+\frac{1}{2.4}+\frac{1}{3.5}+\frac{1}{4.6}+\frac{1}{5.7}+\frac{1}{6.8}+\frac{1}{7.9}+\frac{1}{8.10}\)
TÍNH NHANH
A=\(\frac{1}{2.4}+\frac{1}{4.6}+\frac{1}{6.8}+....+\frac{1}{28.30}\)
tính:\(A=\frac{1}{2.4}+\frac{1}{4.6}+...+\frac{1}{2012.2014}\)
Tính nhanh A=\(\frac{1}{2.4}+\frac{1}{4.6}+...+\frac{1}{26.28}\)
\(\left(1+\frac{1}{1.3}\right).\left(1+\frac{1}{2.4}\right).\left(1+\frac{1}{3.5}\right).\left(1+\frac{1}{4.6}\right)\)