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The Derivative

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Calculus and Analytical Geometry
MTH101
LECTUER ­ 15
The Derivative
Definition of the Derivative
We know that slope of tangent line to the
Example
graph of y=f(x) at the point XD is given by
Hence we have the following definition
Mth101
Page 46
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Calculus and Analytical Geometry
The Derivative
Example
Example
Derivative Notation
Solution
Mth101
Page 47
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Calculus and Analytical Geometry
The Derivative
Existence of Derivative
For example
Remark
Mth101
Page 48
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Calculus and Analytical Geometry
The Derivative
At a corner a tangent line does not exist
because the slopes of the secant lines
do not have a (two sided) limit.
Mth101
Page 49
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Calculus and Analytical Geometry
The Derivative
Mth101
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