Question

Tính \(B=\frac{1}{1-\frac{1}{1-2^{-1}}}\)

Answer 1

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

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

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

Answer 2

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