\(\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)\left(1-\frac{1}{4}\right)\left(1-\frac{1}{5}\right)\left(1-\frac{1}{6}\right)\)
\(=\left(\frac{2-1}{2}\right)\left(\frac{3-1}{3}\right)\left(\frac{4-1}{4}\right)\left(\frac{5-1}{5}\right)\left(\frac{6-1}{6}\right)\)
\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{6}\)
\(=\frac{1}{6}\)
bạn nào giải cho tớ bài này cho rõ ràng nha
(1-1/2)x(1-1/3)x(1-1/4)x(1-1/5)x(1-1/6)
=1/2 x 2/3 x 3/4 x 4/5 x 5/6
=1/6
Nhớ tk cho mình nha. Chắc chắn 100% luôn.
