The data for Exercise 6 were generated using the following functions. Use the error formula to find a bound for the error, and compare the bound to the actual error for the cases n= 1 and n = 2.
a. f (x) = e2x
b. f (x) = x4 − x3 + x2 − x + 1
c. f (x) = x2 cos x − 3x
d. f (x) = ln(ex + 2)