Tangent Line Using Many Different Limit Configurations

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The tangent line to the graph of at
is the limiting position of the secant lines through the two points
and
as
, for any constants
.
Contributed by: Soledad María Sáez Martínez and Félix Martínez de la Rosa (March 2011)
Open content licensed under CC BY-NC-SA
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Reference: W. A. Simpson, "An Illuminating Generalization of the Definition of the Derivative," International Journal of Mathematical Education in Science and Technology, 24(1), 1993 pp. 152–156.
Permanent Citation
"Tangent Line Using Many Different Limit Configurations"
http://demonstrations.wolfram.com/TangentLineUsingManyDifferentLimitConfigurations/
Wolfram Demonstrations Project
Published: March 7 2011