
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
If the function $y=f(x)$ is differentiable in the interval $(a, b)$, and $x_0 \in (a, b)$, if $f'(x_0) = 4$, calculate the value of $$\lim_{h \to 0} \frac {f(x_{0})-f(x_{0}-2h)}{h}$$

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