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问题 填空题

设f(x)在(-∞，+∞)内可导，且[*]
[*]
则a=______．

答案

参考答案：A

解析：[详解] [*]，由微分中值定理得f(x)-f(x-1)=f’(ξ)，其中x-1＜ξ＜x，则[*]，于是e2a=e2，a=1．

单项选择题

瑞士史陶比尔2232型多臂机的拉刀运动是（）。

A、往复运动

B、旋转运动

C、既有往复运动，又有微量的旋转运动

D、既有旋转运动，又有微量的往复运动
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单项选择题

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

If n is an integer, and n≠0, is [*] a positive integer ？（）
(1) n2=25
(2) 5n=25

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.
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