Question

Tìm x biết (x-\(\frac{1}{2}\))³=\(\frac{1}{27}\)

Answer 1

\(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\)

\(\left(x-\frac{1}{2}\right)^3=\left(\frac{1^3}{3^3}\right)\)

\(\left(x-\frac{1}{2}\right)^3=\left(\frac{1}{3}\right)^3\)

=>x-\(\frac{1}{2}=\frac{1}{3}\)

x=\(\frac{1}{3}+\frac{1}{2}=\frac{2}{6}+\frac{3}{6}=\frac{5}{6}\)

Answer 2

x- 1/2^3 = 1/27

x - 1/8    = 1/27

       x      = 1/27 + 1/8

       x       = 35/216