✨ 最佳解答 ✨
長寬為 a、b
2ab = 8 --> ab = 4
造價總金額
= ab*120 + (2a + 2a + 2b + 2b)*80
= 4*120 + (4a + 4b)*80
(4a+4b)/2 ≧ √(4a*4b) = 4√ab = 8
--> 4a+4b ≧ 16
4*120 + (4a + 4b)*80
==> 480 + 16*80 = 1760
✨ 最佳解答 ✨
長寬為 a、b
2ab = 8 --> ab = 4
造價總金額
= ab*120 + (2a + 2a + 2b + 2b)*80
= 4*120 + (4a + 4b)*80
(4a+4b)/2 ≧ √(4a*4b) = 4√ab = 8
--> 4a+4b ≧ 16
4*120 + (4a + 4b)*80
==> 480 + 16*80 = 1760
看了這個問題的人
也有瀏覽這些問題喔😉