13. Let, then=?
A.(A).
B.(B).
C.(C).
D.(D).
- · 有3位网友选择 D,占比30%
- · 有3位网友选择 A,占比30%
- · 有2位网友选择 B,占比20%
- · 有2位网友选择 C,占比20%
A.(A).
B.(B).
C.(C).
D.(D).
15. If, findwhen.
A、(A)-7
B、(B)0
C、(C)
D、(D)
16. Supposeis continuous on [0,2] and differentiable on (0,2),, andfor all. Which is the lowest possible value of?
A、(A) 2
B、(B) 0
C、(C) 1
D、(D) None of above
17. Let. On which of the following intervals is f decreasing?
A、(A).
B、(B).
C、(C).
D、(D)\( f \) is not decreasing on above intervals.
A、(A) If a is a critical point of f, then a is a local minimum point or a local maximum point of f.
B、(B)is increasing on.
C、(C) 0 is a local maximum point of.
D、(D)is constant on.
A、(A) Iffor all, then 0 is a critical point and a local minimum point of f(x) .
B、(B) If a,b are the only two local minimum points of f, thenfor all.
C、(C) If,, thenis a critical point and a local maximum point of f(x)
D、(D) None of above is true.
19. If f is continuous and f is decreasing on, increasing on, then which of the following is true?
A、(A)for any.
B、(B)for any.
C、(C)f has a local minimum at x=0 .
D、(D).
Let,. Find all the points of inflection of.
A、is the point of inflection.
B、is the point of inflection.
C、is the point of inflection.
D、Bothandare the points of inflection.
True or False : Ifdoes not exist anddoes not exist either, thendoes not exist.
A、True.
B、False.
C、-
D、-
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