Question

[Trần Anh Kiệt]

tÌM x

(x + 1/2 ) + ( x + 1/4 ) + ( x + 1/8 ) + ( x + 1/16 ) = 1

Answer 1

[Đinh Tuấn Việt]

\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=1\)

\(x\times4+\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)=1\)

\(x\times4+\frac{15}{16}=1\)

\(x\times4=\frac{1}{16}\)

\(x=\frac{1}{64}\)