作者suecho (Echo)
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标题[试题] 100上 黄汉水 微积分乙上 第三次小考
时间Thu Dec 22 22:15:54 2011
课程名称︰微积分乙上
课程性质︰必修
课程教师︰黄汉水
开课学院:医学院
开课系所︰药学、物治、职治、牙医、医技、公卫、农化
考试日期(年月日)︰2011/12/22
考试时限(分钟):60min.
是否需发放奖励金:Yes
(如未明确表示,则不予发放)
试题 :
一、Find the following integrals: (60%)
(1)∫[cos2t/(2+sin2t)^1/2] dt
π/4
(2)∫ [cos2t/(2+sin2t)^1/2] dt
0
(3)∫[x/(x-1)^1/2] dx
5
(4)∫ [x/(x-1)^1/2] dx
2
(5)∫{x/[(x+1)^1/2 + (5x+1)^1/2]} dx
3
(6)∫ {x/[(x+1)^1/2 + (5x+1)^1/2]} dx
0
4
二、Prove that ∫ (x^4+x)^1/2 dx ≧ 56/3. (20%)
2
[Hint:Using the following theorem
b b
If f(x)≦g(x) for any a≦x≦b then ∫ f(x)dx ≦∫ g(x)dx. ]
a a
b
三、Find the constant b such that ∫ (2√t -t)dt is as large as possible.
0
Explain your answer. (20%)
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