第30题: [单项选择]函数f(x)=ax(a>0,且a≠1),对于任意的实数x、y都有()。 A. f(x=f(f( B. f(x=f(+f( C. f(x+=f(f( D. f(x+=f(f( 参考答案:C 答案解析:
[解析] 由ax+y=axay,得f(x+y)=f(x)f(y)
故正确答案为C。
第31题: [多项选择]MEMO To: Sara Lyons From: Date: 14 March 2003 Subject: Trip to Frankfurt 参考答案:I am going to attend an engineering exhibition in Frankfurt, and the ticket’s date is B0th March, I will be away for one week. During this week I would like you to arrange the training meeting which we have decided and make an appointment with the sales manager. I would like to see him on BGth A0:C0 am.