The polynomial $f(x)$ satisfies $f(x + 1) - f(x) = 6x + 4.$  Find the leading coefficient of $f(x).$
Question:
The polynomial $f(x)$ satisfies $f(x + 1) - f(x) = 6x + 4.$  Find the leading coefficient of $f(x).$
Answer:
Let's think step by step.

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The polynomial $f(x)$ satisfies $f(x + 1) - f(x) = 6x + 4.$  Find the leading coefficient of $f(x).$
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