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  1¡¢  x(coth44y-1/44y)+19864z=4.4;
  2¡¢  x(coth22y-1/22y)+9927z=4.36;
  3¡¢  x(coth3y-1/3y)+1319z=3.28;

   ÎÒ²ÉÓÃmathematicaÇó½âÉÏÊö·½³Ì×飬±à³ÌÈçÏ£º
   Solve[{x*Coth[44y]-x/44y+19864z==4.4&&x*Coth[22y]-x/22y+9927z==4.36&&x*Coth[3y]-x/3y+1319z==3.28},{x,y,z}]¡£
  
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ÒýÓûØÌû:
3Â¥: Originally posted by wxqnano at 2018-10-22 08:32:24
ÄãºÃ£¬ÎÒÕâÑùÊäÈëµÄ£ºNMinmize
Êä³ö½á¹ûÈçÏ£ºNMinmize

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ÊÇNMinimize

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4Â¥2018-10-22 22:54:22
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ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)

¿ÉÒÔÓÃNMinimizeÀ´½â£¬NMinimize[(...-4.4)^2+(...-4.36)^2+(...-3.28)^2,{x,y,z}]

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2Â¥2018-10-19 19:11:08
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wxqnano

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by ËæÌòâÑéÇàÇà at 2018-10-19 19:11:08
¿ÉÒÔÓÃNMinimizeÀ´½â£¬NMinimize

ÄãºÃ£¬ÎÒÕâÑùÊäÈëµÄ£ºNMinmize[(x*Coth[44 y] - x/44 y + 19864 z - 4.4)^2 + (x*Coth[22 y] -
     x/22 y + 9927 z - 4.36)^2 + (x*Coth[3 y] - x/3 y + 1319 z -
     3.28)^2, {x, y, z}]
Êä³ö½á¹ûÈçÏ£ºNMinmize[(-3.28 - (x y)/3 + 1319 z + x Coth[3 y])^2 + (-4.36 - (x y)/
    22 + 9927 z + x Coth[22 y])^2 + (-4.4 - (x y)/44 + 19864 z +
    x Coth[44 y])^2, {x, y, z}]

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3Â¥2018-10-22 08:32:24
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