Question

(文)給出四個(gè)函數(shù)分別滿足:①f(x+y)=f(x)+f(y);②g(x+y)=g(x)·g(y);③u(x·y)=u(x)+u(y);

④v(x·y)=v(x)·v(y).與下列函數(shù)圖象相對(duì)應(yīng)的是

A.①—a ②—d ③—c ④—b                 B.①—b ②—c ③—a ④—d

C.①—c ②—a ③—b ④—d                 D.①—d ②—a ③—b ④—c

Answer 1

答案： (文)D  ①f(x+y)=f(x)+f(y),類比正比例函數(shù),與d對(duì)應(yīng);

②g(x+y)=g(x)g(y),類比y=a^x,與a對(duì)應(yīng);

③u(x·y)=u(x)+u(y),類比y=log_ax,與b對(duì)應(yīng);

④v(xy)=v(x)v(y),類比y=x²,與c對(duì)應(yīng).