Question

tính (2 phần 3)^2+(1 phần 2)^2.(2 phần 3)^2

Answer 1

\(\left(\frac{2}{3}\right)^2+\left(\frac{1}{2}\right)^2.\left(\frac{2}{3}\right)^2\)

\(=\frac{2^2}{3^2}+\frac{1}{3^2}=\frac{2^2+1}{3^2}=\frac{5}{3^2}=\frac{5}{9}\)

\(\Rightarrow\frac{5}{9}\)