Question

giải chi tiết

Answer 1

help

Answer 2

b=1/2;2/5

Answer 3

Ta có:\(\dfrac{1}{3}\)=\(\dfrac{1x2}{3x2}\)=\(\dfrac{2}{6}\) ; \(\dfrac{2}{3}\)=\(\dfrac{2x2}{3x2}\)=\(\dfrac{4}{6}\)

\(\dfrac{2}{6}\) < X < \(\dfrac{4}{6}\)

X=\(\dfrac{3}{6}\)=\(\dfrac{1}{2}\)

Answer 4

x = 3/6 = 1/2

Answer 5

\(b=\left\{\dfrac{1}{2};\dfrac{2}{5}\right\}\)