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\[{a_n} = \frac{{4{a_{n - 1}}}}{{{a_{n - 1}}^2 - 2{a_{n - 1}} + 1}}\] 青青子衿 发表于 2015-6-25 14:17
回复 青青子衿 \[{a_n} = \frac{{4{a_{n - 1}}}}{{{a_{n - 1}}^2 - 2{a_{n - 1}} + 1}} \] \[\Rightarrow {a_n} = {( {\frac{{{a_{n - 1}} + 1}}{{{a_{n - 1}} - 1}}})^2} - 1\] ... 青青子衿 发表于 2015-6-25 19:17
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