
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the function $f(x)= \frac {a}{a-1}(2^{x}-2^{-x})$, where $a > 0$ and $a \neq 1$.
(1) Determine the even/odd property and monotonicity of the function $f(x)$, and explain the reasons;
(2) When $x \in (-1,1)$, there is always $f(m-1)+f(m) < 0$, find the range of the real number $m$.

Present the answer in LaTex format: \boxed{Your answer}
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