About Lesson
13.1 Derivatives 导数
[1]
Differentiate the following functions by the first principle.
用第一法则微分下列各函数
(a) y = x
(b) y = 4x
(c) y =
(d) f (x) =
Answer 答案:
(a) 2x
(b) 4
(c)
(d)
[2]
Determine the derivative of the following functions at by the first principle.
用第一法则计算在时下列各函数的导数。
(a)
(b)
(c)
Answer 答案:
(a) 6
(b) 1
(c)
[3]
Given that f(x)= , find the value of f ’(5) by first principle.
已知 f(x)= , 用第一法则求 f ’(5) 的值。