
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 function $f(x) = m + \log_{a}x$ ($a > 0$ and $a \neq 1$) has its graph passing through the points $(8, 2)$ and $(1, -1)$.
(Ⅰ) Find the explicit formula of the function $f(x)$;
(Ⅱ) Let $g(x) = 2f(x) - f(x - 1)$, find the minimum value of $g(x)$ and the value of $x$ at which the minimum is attained.

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