
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
In the process of selecting test points using the 0.618 method, if the experimental interval is $[1000,2000]$, and the first three test points are $x_1, x_2, x_3$ (with $x_2 < x_1$); and if the result at $x_2$ is better than that at $x_1$, then $x_3$ equals?

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