x4 =
1765/216-1/216*166991^(1/2) y4 =
1375/216-520675/36070056*166991^(1/2)
>> x4 =1765/216-1/216*166991^(1/2) x4 =
6.2794
>> y4 =1375/216-520675/36070056*166991^(1/2) y4 =
0.4669
>> 5.6*(x4^2+(y4-5)^2)^0.5+7.2*y4+6*((x4-15)^2+(y4-8)^2)^0.5+5*(21+7.2)
ans =
256.8742 %¹«Ë¾Ò»µÄ¹ÜÏß½¨Éè·ÑÓÃ
>> 5.6*(x4^2+(y4-5)^2)^0.5+7.2*y4+6*((x4-15)^2+(y4-8)^2)^0.5+5*(24+7.2)
ans =
271.8742 %¹«Ë¾¶þµÄ¹ÜÏß½¨Éè·ÑÓÃ
>> 5.6*(x4^2+(y4-5)^2)^0.5+7.2*y4+6*((x4-15)^2+(y4-8)^2)^0.5+5*(20+7.2)
ans =
251.8742 %¹«Ë¾Ò»µÄ¹ÜÏß½¨Éè·ÑÓÃ
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