(本小题满分14分,每小题7分) 化简下列各式:(1) ; (2) .

(本小题满分14分,每小题7分) 化简下列各式:(1) ; (2) .

题型:解答题难度:简单来源:不详
(本小题满分14分,每小题7分)
化简下列各式:
(1) ; (2)
答案

(1)0
(2)1
解析

(1) 解:原式=························································ 2分
=·················································· 4分
=·········································································· 6分
=" 0···················································································" 7分
(2) 解:原式=············································ 4分
="1····································" 7分
举一反三

已知函数,正实数依次成公差为正数的等差数列,且满足,若实数是方程的一个解,那么下列四个判断:①;②;③;④中有可能成立的个数为___                            
题型:填空题难度:一般| 查看答案
(本题满分12分)已知函数
(Ⅰ)试证函数f(x)的图象关于点对称;
(Ⅱ)若数列的通项公式为, 求数列的前项和
(Ⅲ)设数列满足:。设。若(Ⅱ)中的满足对任意不小于2的正整数恒成立,试求的最大值。
题型:解答题难度:一般| 查看答案
函数的反函数是
A.B.
C.D.

题型:单选题难度:一般| 查看答案
函数在区间上的零点个数为(    )
A.1个B.2个C.3个D.4个

题型:单选题难度:一般| 查看答案
函数零点的个数为(   )
A 4             B 3            C 2           D 1
题型:单选题难度:一般| 查看答案
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