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bin0415

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btx97

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CODE:
In[2]:= Reduce[x^5 - 2 x + 1 == 0, x, Reals] // N  Out[2]= x == 1. || x == -1.29065 || x == 0.51879

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2Â¥2012-06-16 22:03:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

btx97

½ð³æ (СÓÐÃûÆø)

CODE:
In[1]:=
sol = Solve[x^5 - 2 x + 1 == 0, x]; x = x /. sol;
Select[x, Element[#, Reals] &] // N  

Out[3]=
{1., -1.29065, 0.51879}

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3Â¥2012-06-16 22:19:35
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4Â¥2012-06-18 11:37:31
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