A: I need to lose some weight. My clothes don't fit anymore.____

B: Well, instead of watching TV all day, you could do more exercise.

A:____

B: Like cycling, or you could work out at the gym.

A: I don't have time.____

B: OK, then you could change your diet.____

A: You mean no more hamburgers! Oh no!

B: OK._____

已知f（log_ax）=x﹣$\frac{k-1}{x}$（k∈R），且函数f（x）是定义域为R的奇函数，其中a＞0，且a≠1．

（1）求k的值；

（2）判断函数f（x）的单调性，并证明你的结论；

（3）若f（1）=$\frac{3}{2}$时，不等式f（a^2x+a^﹣2x）+f（ma^﹣x﹣ma^x）＞0对任意x∈1，+∞）均成立，求实数m的取值范围．

句型转换。

Please call Tom ____0811-65784  .