标题: 求教 [打印本页] 作者: 我要吃sumei 时间: 2011-11-16 08:48 标题: 求教 题目:
Determine the general equation of the secant from any point (A, f(A)) to the point on f(x)=4x where x=2.
(确定在任意点(A,f(A))到点在x=2的f(x)=4^x上的一般方程的正割。
Describe how you would use this to find the equation of the tangent at the point (2, f(2)).
(描述你将怎么运用这个信息去找出这个方程在点(2,f(2))上的切线。
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