題目列表(包括答案和解析)
下列對(duì)應(yīng)中是集合A到集合B的映射的個(gè)數(shù)為
①A={1,3,5,7,9},B={2,4,6,8,10},對(duì)應(yīng)法則f:x→y = x+1,x∈A,y∈B;
②A={x|00<x<900,B={y|0<y<1,對(duì)應(yīng)法則f:x→y = sinx,x∈A,y∈B;
③A={x|x∈R},B={y|y≥0},對(duì)應(yīng)法則f:x→y = x2,x∈A,y∈B.
A.0 B.1 C.2 D.3
下列對(duì)應(yīng)中是集合A到集合B的映射的個(gè)數(shù)為
①A={1,3,5,7,9},B={2,4,6,8,10},對(duì)應(yīng)法則f:x→y = x+1,x∈A,y∈B;
②A={x|00<x<900,B={y|0<y<1,對(duì)應(yīng)法則f:x→y = sinx,x∈A,y∈B;
③A={x|x∈R},B={y|y≥0},對(duì)應(yīng)法則f:x→y = x2,x∈A,y∈B.
A.0 B.1 C.2 D.3
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