
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 ellipse $\frac{{x}^{2}}{{a}^{2}}+\frac{{y}^{2}}{{b}^{2}}=1\ (a > b > 0)$ with focus $F(c,0)$, draw a perpendicular line from $F$ to the $x$-axis, which intersects the ellipse at points $A$ and $B$. If $\triangle AOB$ is an acute-angled triangle, find the range of the eccentricity of the ellipse.

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