
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
Among the following functions, which one is increasing on the interval $(0, +\infty)$?

1. $y=-x^2$
2. $y=\frac{1}{x}$
3. $y=\left(\frac{1}{2}\right)^x$
4. $y=\log_2{x}$

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