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walk1997
½ð³æ (ÖøÃûдÊÖ)
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jjdg: ½ð±Ò+1, ¸Ðл²ÎÓë 2012-12-16 00:19:35
jjdg: ½ð±Ò+1, ¸Ðл²ÎÓë 2012-12-16 00:19:35
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ÉÏÃæ´úÂëÏÔʾºÃÏñ²»¶Ô ÏÂÃæÕâ¸ö f[x_] := x^7 + 2 t1 = x /. Solve[f[x] == 0, x]; t1 = DeleteCases[t1, x_ /; Element[x, Reals]]; t2 = x /. Solve[f[x] == 0, x, Reals]; r1 = Table[ Solve[ComplexExpand[Im[t1[]^2 - a*t1[] + b]] == 0, a], {i, 1, Length[t1]}] // Flatten; r1 = DeleteDuplicates[r1]; r2 = Table[ Solve[ComplexExpand[Re[t1[]^2 - a*t1[] + b]] == 0, b], {i, 1, Length[t1]}] // Flatten; r2 = DeleteDuplicates[r2]; r3 = Table[{r1[], r2[] /. r1[]}, {i, 1, Length[r1]}]; ff1 = Table[temp1 = x^2 - a*x + b /. r3[] // Expand; Print[temp1]; temp1, {i, 1, Length[r3]}]; ff2 = Table[temp1 = x - t2[]; Print[temp1]; temp1, {i, 1, Length[t2]}]; ff = Join[ff1, ff2]; Apply[Times, ff] Apply[Times, ff] // N // Chop |
7Â¥2012-12-15 13:52:59
ÍÛÈûÅÝÅÝ
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2Â¥2012-12-11 11:25:31
situxuming
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3Â¥2012-12-11 17:55:38
situxuming
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4Â¥2012-12-11 17:57:38













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