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