Simone
1楼答对了??11对应指的是AB集合中 A集合中所有元素在B集中都有象 且唯一.B集中所有元素在A集中也有象且唯一..并且 A集和 B集元素个数相等..楼上的你们的尘哪拆数学好烂就别乱指导别人.OK?One-to-One FunctionA function for which every element of the range of the function corresponds to exactly one element of the domain. One-to-one is often written 1-1.Note: y = f(x) is a function if it passes the vertical line test. It is a 1-1 function if it passes both the vertical line test and the horizontal line test. Another way of testing whether a function is 1-1 is given below. 这个是 英文解释 翻译了意思是 函数内不存在A不等于B 并且使FA=FB存在的2点..换句话说 如果函数有FA=FB 则A必然等于B..这派枣个才是原始定义.几何解缓差释就是任何一条Y=C的直线与函数图象不能相交于2点....拜托回答前先GOOGLE一下...
