Concept explainers
a.
To confirm that the point
Given:
The function:
The line:
Confirmation:
Confirming that
Substitute
Thus, the equation of the line
That is,
Confirming that
Substitute
Thus,
That is,
Now, since the point
b.
To zoom in at the point
The portion of the graph around
It is observed that
Hence, it is concluded that
c.
To view the graphs of
It seems like the line
The line
It seems like the line
So, the definition of the tangent in the case of circles is inappropriate to use here. The only possible way to define a tangent is to approximate such a line.
Chapter 2 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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