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阿摩：吃得苦中苦，方為人上人
100分
(15 秒)
模式:自由測驗
科目:研究所、轉學考(插大)-微積分
難度:隨機
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1(C).
X


5. Where is the function f(x)=x4-6x2-5 concave up ?
(A) x ≥- 1
(B) x≥ 0
(C) x≥1
(D)|x|≥ 1  
(E) None of these



2(C).
X


5. (a) The series is absolutely convergent.

 (b) The series is absolutely convergent.
 (c) The series  is absolutely convergent.

  Among the above three statements, how many of them are true?
(A)Only one.
(B) Only two.
(C)All of them.
(D) None of them. 



3(D).
X


16. Find the relative extrema and saddle points of the function f(x,y)= .
(A) Relative maximum at   Saddle point at (0, 0, 0).
(B) Relative minimum at   Saddle point at (0, 0, 0).
(C) Relative maximum at (0, 0, 0). Saddle point at 
(D) Relative minimum at (0, 0, 0). Saddle point at 
(E) None of these



4(D).
X


2. lim(x,y )→(0,0) 61ca6a8f64535.jpg=
(A) 2
(B) 1
(C)0
(D) ㆀ



5(C).
X


11. Find the average value of f (x)=x-x2 from x = 0 to x = 6 . This answer is
(A) - 9
(B) -11
(C)-15
(D)- 30
(E) None of these



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