Consider that y = f(x) and point P (x , y ) on a curve as at the figure 2.1.
If x increase to
and y increase to 
, thus the new coordinates is becomes
When Q approaches the point P,
will approaches to zero. And it’s written as
Therefore, from the limit idea, derivatives represent the slope of curve at a point.
And the First Principles Formulae is
Example :
If x increase to
and y increase to 
, thus the new coordinates is becomes
When Q approaches the point P,
will approaches to zero. And it’s written as
Therefore, from the limit idea, derivatives represent the slope of curve at a point.
So,
And the First Principles Formulae is
Example :
Differentiate the function below.
Solution :
No comments:
Post a Comment