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\lim _ { x \rightarrow 2 } \frac { x ^ { 4 } - 4 x ^ { 3 } + 5 x ^ { 2 } - 4 x + 4 } { x ^ { 4 } - 4 x ^ { 3 } + 6 x ^ { 2 } - 8 x + 8 } =
Question

求极限的值

使用变换法求值
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使用洛必达法则求值
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替代形式
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