设
是集合A ={1,2,3,4}到集合 B={a，b，c，d}的关系，则ranR =__________ ,domR =__________
{a,b,d}；{1,2,4}
设是集合A ={1,2,3,4}到集合 B={a，b，c，d}的关系，则ranR =__________ ,domR =__________
设是集合A ={1,2,3,4}到集合 B={a，b，c，d}的关系，则ranR =__________ ,domR =__________
{a,b,d}；{1,2,4}
