\(4\sqrt{\dfrac{2}{9}}+\sqrt{2}+\sqrt{\dfrac{1}{18}}\)
\(=4\sqrt{2.\dfrac{1}{9}}+\sqrt{2}+\sqrt{\dfrac{2}{36}}\)
\(=\dfrac{4}{3}\sqrt{2}+\sqrt{2}+\dfrac{1}{6}\sqrt{2}\)
\(=\sqrt{2}\left(\dfrac{4}{3}+1+\dfrac{1}{6}\right)\)
\(=\dfrac{5}{2}\sqrt{2}=\dfrac{5\sqrt{2}}{2}\)
=1/3*căn 2+căn 2+1/6*căn 2
=3/2*căn 2
ta đặt P= 4\(\sqrt{\dfrac{2}{9}}\)+\(\sqrt{2}+\sqrt{\dfrac{1}{18}}\)Δ
P= \(\dfrac{4\sqrt{2}}{3}+\sqrt{2}+\dfrac{\sqrt{2}}{6}\)☠
P= \(\dfrac{24\sqrt{2}}{18}+\dfrac{18\sqrt{2}}{18}+\dfrac{3\sqrt{2}}{18}\)☯
P=\(\dfrac{45\sqrt{2}}{18}\)Ω
P=\(\dfrac{5\sqrt{2}}{2}\)
