
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 $f(x)=1- \frac {4}{2a^{x}+a}$ $(a > 0 \text{ and } a\neq 1)$ is an odd function defined on $(-\infty,+\infty)$.  
$(1)$ Find the value of $a$;  
$(2)$ Find the range of the function $f(x)$;  
$(3)$ When $x\in(0,1]$, $t\cdot f(x)\geqslant 2^{x}-2$ always holds, find the range of the real number $t$.

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