\(=\frac{1}{1x2}+\frac{1}{2x4}+\frac{1}{4x8} +\frac{1}{8x16}+\frac{1}{16x32}\)
\(=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{4}+\frac{1}{4}-\frac{1}{8}+\frac{1}{8}-\frac{1}{16}+\frac{1}{16}-\frac{1}{32}\)
\(=1-\frac{1}{32}\)
\(=\frac{31}{32}\)
nè ..!
\(\frac{1}{2}+\frac{1}{8}+\frac{1}{32}+\frac{1}{128}+\frac{1}{512}\)
\(=\frac{256+64+16+4+1}{512}\)
\(=\frac{341}{512}\)