Given that a sequence satisfies $x_0=0$ and $|x_k|=|x_{k-1}+3|$ for all integers $k\ge1$, find the minimum possible value of $|x_1+x_2+\cdots+x_{2006}|$.
Question:
Given that a sequence satisfies $x_0=0$ and $|x_k|=|x_{k-1}+3|$ for all integers $k\ge1$, find the minimum possible value of $|x_1+x_2+\cdots+x_{2006}|$.
Answer:
Let's think step by step.

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Given that a sequence satisfies $x_0=0$ and $|x_k|=|x_{k-1}+3|$ for all integers $k\ge1$, find the minimum possible value of $|x_1+x_2+\cdots+x_{2006}|$.
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