作者dreamenjoy (今天也很爽)
看板trans_math
標題[考古] 99師大考古
時間Thu May 26 00:33:00 2011
99師大考古
1.
S is the region formed by x=y,x+y-3=0 and x=0.please find the
double integral of ∫∫(2x+2y-1)dxdy
2.
The weekly cost to produce x widgets is given by
C(x)=75000+100x-0.03x^2+0.000004x^3,
0<=x<=10000 and the demand function for the widgets is given by
p(x)=200-0.005x,0<=x<=10000 Assume that the company sells exascly what
they protuce.
(a)What are the marginal cost,marginal revenue and marginal profit when 2500
widgets are sold?
(b)What are the marginal cost,marginal revenue and marginal profit when 7500
widgets are sold?
我承認我英文很差看不懂題目。
北大考古
3.
設某工廠生產某產品之固定成本為200,000元，每一產品之變動成本為400元，
製成後售出之價格每件為500元，求
(a)產品的成本函數
(b)產品的收入函數
(c)利潤函數
(d)扯平點
4.
使用Lagrange求點(1.2.4)至平面2x-3y+z=4之最短距離
5.
1
∫arctan xdx
0
這題我也看不懂XD
題目有點多麻煩各位高手了，先說聲感恩不盡。
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◆ From: 122.118.8.163
1F：→ a016258:5.有什麼好看不懂@@? 分部積分~~ 114.44.184.240 05/26 07:13
2F：→ dreamenjoy:arc 我看無 是單純積分的意思嗎?? 122.118.3.236 05/26 09:59
3F：推 a016258:arctan 是一個函數~ 114.44.184.240 05/26 10:11