Question
Sat June 16, 2012 By: Usha

about derivatives...

Expert Reply
Wed June 20, 2012
The derivative is a measure of how a function changes as its input changes.
 
Loosely speaking, a derivative can be thought of as how much one quantity is changing in response to changes in some other quantity; for example, the derivative of the position of a moving object with respect to time is the object's instantaneous velocity.
 
The definition of the derivative can be approached in two different ways. One is geometrical (as a slope of a curve) and the other one is physical (as a rate of change).
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