已知实数x满足（$\frac{1}{3}$）^2x﹣4﹣（$\frac{1}{3}$）^x﹣（$\frac{1}{3}$）^x﹣2+$\frac{1}{9}$≤0且f（x）=log₂$\frac{x}{2}$${\log }_{\sqrt{2}}\frac{\sqrt{x}}{\sqrt{2}}$

（1）求实数x的取值范围；

（2）求f（x）的最大值和最小值，并求此时x的值．

拼拼，读读，写写。

What are the children doing?

    What are you doing,children ?Oh, we are playing games,Look at LiLei,He is throwing the frisby with Jim .What about the twins? They are flying kites.The kites are very nice.One looks like a bird,the other is like a plane, LiTao is Playing basketball with me. HanMei and MaLin are singing an English song under a big tree.

西气东输一，二期工程的线路都经过了（    ）