
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
The triangular array \(\left(a_{n, k}\right)\) of numbers is given by \(a_{n, 1}=\frac{1}{n}\), for \(n=1,2,\ldots\), \(a_{n, k+1}=a_{n-1, k}-a_{n, k}\), for \(1 \leq k \leq n-1\). Find the harmonic mean of the 1985th row.

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