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mafuwu

Òø³æ (СÓÐÃûÆø)

[½»Á÷] ¡¾ÇóÖú¡¿ÇóÖú±à³Ì£¬¼± ÒÑÓÐ7È˲ÎÓë

ÓÐÒ»º¯Êý2/(2 + 1/4 (a + Sqrt[a^2 + 8])^2)£¬»­³ö¸Ãº¯ÊýµÄͼÏñ£¬Ëæºó½«º¯ÊýÀïÃæµÄËùÓÐaÌæ»»Îªa (a + Sqrt[a^2 + 8])^2/16£¬ÒԴ˽øÐУ¬µü´ú5´Î¡£sqrtÊǶÔ[a^2 + 8]¿ª¸ùºÅ¡£ÓÃForÑ­»·£¬whileÑ­»·£¬doÑ­»·¶¼¿É¡£µ«ÒªÔÚmathematicaµÄ³ÌÐòÏ¡£Ð»Ð»ÁË

[ Last edited by senlia on 2010-4-13 at 13:44 ]
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» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

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ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

mshwangg

ÖÁ×ðľ³æ (ÕýʽдÊÖ)

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mafuwu(½ð±Ò+2):лл²ÎÓë
ÒýÓûØÌû:
Originally posted by resonant at 2010-04-20 13:26:35:
Â¥Ö÷µÄÒªÇóºÜÆæ¹Ö£¬ÓÖÒªÇóʹÓÃForµÈÑ­»·£¬ÓÖ²»ÄÜÊǸöµü´ú³ÌÐò...

°æÖ÷ºÜÇ¿´ó£¡Ï¡·¹
9Â¥2010-04-30 15:07:56
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 13 ¸ö»Ø´ð

resonant

ľ³æ (ÕýʽдÊÖ)

¶À×ÔΪÕþ

¡ï
mafuwu(½ð±Ò+2):лл²ÎÓë
»­¸öº¯Êý»¹ÊǺܼòµ¥µÄ°É?
fa[a_]=2/(2 + 1/4 (a + Sqrt[a^2 + 8])^2);
Plot[fa[a], {a, -10, 10}, DisplayFunction -> $DisplayFunction];

[ Last edited by resonant on 2010-4-14 at 17:22 ]
½»ÅóʶÓÑ£¬ÃÍ¸ã¿ÆÑС£Á½ÊÖ×¥£¬Á½ÊÖ¶¼ÒªÓ²¡£
2Â¥2010-04-13 21:14:16
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

resonant

ľ³æ (ÕýʽдÊÖ)

¶À×ÔΪÕþ

¡ï ¡ï ¡ï ¡ï ¡ï
wangen994(½ð±Ò+2):¸Ðл²ÎÓëÓ¦Öú 2010-04-14 08:08
wangen994(½ð±Ò+3):»î¶¯ÆÚ¼ä¶îÍâ½±Àø 2010-04-14 08:08
mafuwu(½ð±Ò+6):лл¡£µ«²»¶Ô£¬ÎÒÏëÈÃËûÃdzöÏÖÔÚÒ»¸ö³ÌÐòÀïÃæ£¬ÕâÊÇÒ»¸öµü´ú³ÌÐò 2010-04-14 15:16
ºóÒ»°ëÒ²²»ÄÑ

For[i = 0, i < 5, fa[a_] = 2/(2 + 1/
  4 (a + Sqrt[a^2 + 8])^2) /. a -> a (a + Sqrt[a^2 + 8])^2/16, i++]
?fa
Â¥Ö÷×Ô¼ºÔËÐÐһϿ´¿´¡£ÎÒÓõÄÊÇ5.2

my result:
\!\(\*
  InterpretationBox[GridBox[{
        {GridBox[{
              {\(fa[a_] = 2\/\(2 +
        1\/4\ \((1\/16\
            a\ \((a + \@\(8 +
              a\^2\))\)\^2 + \@\(8 +
                  1\/256\ a\^2\ \((a + \@\(8 + a\^2\))\)\^4\))\)\^2\)\)}
              },
            GridBaseline->{Baseline, {1, 1}},
            ColumnWidths->0.999,
            ColumnAlignments->{Left}]}
        },
      GridBaseline->{Baseline, {1, 1}},
      ColumnAlignments->{Left}],
    Definition[ "fa"],
    Editable->False]\)

¾­ÔٴμìÑ飬Èç¹ûµ¥´ÎÊÖ¶¯¼ÆËãµÄ»°£¬Ëƺõ½á¹ûÒª¸´ÔӵĶࡣ¿ÉÄÜÎÒ´íÁË¡£ÆÚ´ý¸ßÊÖÉϳ¡¡£

[ Last edited by resonant on 2010-4-13 at 22:03 ]
½»ÅóʶÓÑ£¬ÃÍ¸ã¿ÆÑС£Á½ÊÖ×¥£¬Á½ÊÖ¶¼ÒªÓ²¡£
3Â¥2010-04-13 21:23:29
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1377429145

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ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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