Question

b =\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{6}...+\frac{1}{128}+\frac{1}{256}\)

Answer 1

giong bai kia thui

nhung bay gio mk phai off rui

6.30 mk se giai cho nha

chuc bn hoc tot

$$$

Answer 2

Số thích hợp để điền vào chỗ chấm là:397/384

k mk nhé!thanks

Answer 3

\(\frac{1}{2}=1-\frac{1}{2}\)

\(\frac{1}{4}=\frac{1}{2}-\frac{1}{4}\)

\(\frac{1}{8}=\frac{1}{4}-\frac{1}{8}\)

\(\frac{1}{16}=\frac{1}{8}-\frac{1}{16}\)\(......\)

Vay B=\(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{4}+\frac{1}{4}-\frac{1}{8}+\frac{1}{8}-\frac{1}{16}+......+\frac{1}{64}-\frac{1}{128}+\frac{1}{128}-\frac{1}{256}\)

\(B=1-\frac{1}{256}\)

\(B=\frac{255}{256}\)