Find a d that satisfies the definition of the
f(x) = x2 - 8x + 4
as x approaches a = 4.4 for various values of epsilon
starting with e = 0.5.
In the following LiveMath Notebook, you can see the graph of y = f(x) in blue,
the graphs of y = L + e and y = L - e in red and the graphs of
x = a + d and x = a - d in green.
Start with a = 4.4 and e = 0.5 and then find out which d would satisfy
the definition of limit. Next, try different values for e and find the corresponding d's.
Change the values of e and then find out which d would satisfy the definition of limit.
Click here if you would
like to see more information about using a notebook similar to the following
Explore with changing a; consider a = 6, 8, 16 and using the same epsilon's. Can you detect a pattern?
Acknowledgment: This notebook is a modification of a similar notebook
in the MathView User's Guide.