Các câu hỏi tương tự
Thuc hien phep tinh:
E=\(1+\frac{1}{2}\left(1+2\right)+\frac{1}{3}\left(1+2+3\right)+\frac{1}{4}\left(1+2+3+4\right)+...+\frac{1}{2016}\left(1+2+...+2016\right)\)
Thuc hien phep tinh
e)\(\left(\frac{2}{3}-\frac{-2}{7}-\frac{1}{14}\right):\left(-1-\frac{3}{7}+\frac{3}{28}\right)\)
f) \(\left(\frac{1}{2}-1\right)\left(\frac{1}{3}-1\right)\cdot\left(\frac{1}{4}-1\right)...\left(\frac{1}{100}-1\right)\)
\(\left(1-\frac{1}{3}\right).\left(1-\frac{1}{6}\right).\left(1-\frac{1}{10}\right).\left(1\frac{1}{15}\right).....\left(1-\frac{1}{780}\right)\)
Tính:
\(\left(1-\frac{1}{3}\right)\left(1-\frac{1}{6}\right)\left(1-\frac{1}{10}\right)\left(1-\frac{1}{15}\right).....\left(1-\frac{1}{780}\right)\)
\(\left(1-\frac{1}{3}\right)\times\left(1-\frac{1}{6}\right)\times\left(1-\frac{1}{10}\right)\times\left(1-\frac{1}{15}\right)\times...\times\left(1-\frac{1}{780}\right)\)
Tìm C biết:
C= \(\left(1-\frac{1}{3}\right).\left(1-\frac{1}{6}\right).\left(1-\frac{1}{10}\right).\left(1-\frac{1}{15}\right).....\left(1-\frac{1}{780}\right)\)
24 tháng 4 2016 lúc 20:19
Tính :
a) \(\left(1-\frac{1}{3}\right).\left(1-\frac{1}{6}\right).\left(1-\frac{1}{10}\right).\left(1-\frac{1}{15}\right).\left(1-\frac{1}{21}\right)...\left(1-\frac{1}{780}\right)\)
b) \(\left(1-\frac{1}{2}\right)+\left(1-\frac{1}{4}\right)+\left(1-\frac{1}{8}\right)+...+\left(1-\frac{1}{512}\right)+\left(1-\frac{1}{1024}\right)\)
Tính giá trị biểu thức sau đây:
c)
\(\left(1-\frac{1}{3}\right)\left(1-\frac{1}{6}\right)\left(1-\frac{1}{10}\right)\left(1-\frac{1}{15}\right)...\left(1-\frac{1}{780}\right)\)
D=(\(\left(1-\frac{1}{3}\right)\left(1-\frac{1}{6}\right)\left(1-\frac{1}{10}\right)\left(1-\frac{1}{15}\right)...\left(1-\frac{1}{780}\right)\)
Khó quá giúp tớ với