This topic has been archived. It cannot be replied.
-
工作学习 / 学科技术讨论 / 求教个数学或编程问题答案:边长为A的大正方形,以45度角(平行对角线)切割成众多长X宽Y的小长方形,怎样切才能得到最大值?能给出数学公式最好,编程求出也很好!
-polar_bear(多体);
2007-11-19
(#4065208@0)
-
it is the time human brain will win. this is an absolute symmetry. so, it must got max when x=y
-elecskunk(elecskunk);
2007-11-19
(#4068615@0)
-
图解说明一下
-polar_bear(多体);
2007-11-20
{1083}
(#4070574@0)
-
不会吧, 兄弟. 真的把中学的那一点点都忘光了.1) 假设大A的边长是 a 吧.内框切在 x 处.
2) 细节不多写了吧. 切下的小正方形面积是 2(ax-x.x)
3) 2(ax-xx) 的极值点是 x=a/2
-huyou(忽悠);
2007-11-25
{120}
(#4081258@0)