Question

ai chỉ mình mình follow

Answer 1

a: \(=\dfrac{-4-2}{6}+\dfrac{4+2}{24}+\dfrac{4+2}{96}+\dfrac{2}{192}\)

\(=-1+\dfrac{1}{4}+\dfrac{1}{16}+\dfrac{1}{96}\)

\(=\dfrac{-96+24+6+1}{96}=\dfrac{-65}{96}\)

b: \(=\dfrac{-2+1}{4}+\dfrac{1}{8}+...+\dfrac{1}{256}\)

\(=\dfrac{-1}{4}+\dfrac{1}{8}+...+\dfrac{1}{256}\)

\(=\dfrac{-2+1}{8}+...+\dfrac{1}{256}=\dfrac{-1}{256}\)

Answer 2

cái này quy đồng lên số cuối là ra mà bn?:))