一个数学问题whichsetsoforderedpairsrepresentfunctionsfromAtoB?EXPLAIN.A={0,1,2,3}andB={-2,-1,0,1,2}(a){(0,1),(1,-2),(2,0),(3,2)}(b){(0,0),(1,0),(2,0),(3,0)}(c){(0,2),(3,0),(1,1)}

Question

一个数学问题
which sets of ordered pairs represent functions from A to B?
EXPLAIN.
A = {0,1,2,3} and B = {-2,-1,0,1,2}
(a){(0,1),(1,-2),(2,0),(3,2)}
(b){(0,0),(1,0),(2,0),(3,0)}
(c){(0,2),(3,0),(1,1)}

Answer 1

选择A,函数是一对一的对应关系,而且定义域的每个函数都应有值域的一个数值与其对应,只有A符合选项.其他不行.