数学教员教授电子版微积分的课堂
(2018-08-08 07:55:14)数学教员教授电子版微积分的课堂
小妙招儿
DEFINITION
A real fimction of one variable is a set f of ordered pairs of real numbers such that for every real number a one of the following two things happens:
(i) There is exactly one rea了number b for which the ordered pair (a, b) is a member of f. In this case we say that f(a) is defined and we write f(a) = b. The number b is called the value of f at a.
(ii) There is no real number b for which the ordered pair (a, b) is a member of f. In this case we say that f(a) is undefined.
注意:Woed文件格式,具有自动排版功能,文字大小自如,而且文字不会超出大屏幕边界。
袁萌