
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 odd function $f(x)$ that satisfies $f(x+2)=f(x)$, and when $x \in [0,1]$, $f(x)=x$. The analytical expression of the function $f(x)$ when $x \in [k, k+1] (k \in \mathbb{Z})$ is _____.

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