
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 a geometric sequence $\{a_n\}$ satisfies $a_{n+1}+a_{n}=9\cdot 2^{n-1}$, where $n\in\mathbb{N}^*$.  
(I) Find the general formula for the sequence $\{a_n\}$.  
(II) Let the sum of the first $n$ terms of the sequence $\{a_n\}$ be $S_n$. If the inequality $S_n > ka_n-2$ holds for all $n\in\mathbb{N}^*$, find the range of the real number $k$.

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