作者tiyico (宏)
看板trans_math
標題[考古] 95政大
時間Tue Jul 3 14:07:03 2007
Find the area of the region in the first quacrant that is bounded above
by the curve y = √x and below by the x-axis and the line y = x-2
(我不確定題目給的範圍是哪塊?)
2/3
Find the length of y = (x/2) from x= to x=2
一般的方法我試過不好算
我令x = 2sin^3t
y = sin^2 t 再利用參是公式먊 2
結果得了 ---(10^3/2 - 1) 不大有把握
27
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 210.71.59.89
1F：推 ahongyeh:above by:上界 below by:下界 218.164.78.75 07/03 14:58
2F：→ mathmac:x軸上方，左邊是y=√x，右邊是y = x-2 211.76.80.139 07/03 15:55
3F：推 tiyico:喔喔我大概懂了 那跟我想的一樣 210.71.59.85 07/03 17:19
※ 編輯: tiyico 來自: 210.71.59.85 (07/03 17:22)
4F：推 dreamroyc:我算1.跟你答案 61.230.14.116 07/05 14:34
5F：→ dreamroyc:答案差好多 61.230.14.116 07/05 14:34
6F：推 dreamroyc:重算一次，答案跟你一樣。 61.230.14.116 07/05 14:44