
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 $\{a_n\}$, where $a_2=2$, and $a_2$, $a_3+1$, $a_4$ form an arithmetic sequence. The sum of the first $n$ terms of the sequence $\{b_n\}$ is $S_n$, and $\frac{1}{S_n} = \frac{1}{n} - \frac{1}{n+1}$. Find the value of $a_8+b_8$.

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