题目

已知函数.   (Ⅰ)判断函数的奇偶性,并证明;   (Ⅱ)利用函数单调性的定义证明:是其定义域上的增函数. 答案:解析:(Ⅰ)的定义域为,  (1分) ,                           (3分) ∴为奇函数.                                                      (4分) (Ⅱ)任取、,且,                                     (5分)                    ________about the result of the experiment,he still wants to give it a try.A.Uncertain as he isB.As uncertain he is C.As he is uncertainD.Uncertain is he as
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