First assignment

The computer exercise 4.1.1 is a bit imprecise.

In 1(a), first part, you should plot |f(x)-p(x)| with the y-axis logarithmic.

In 1(a), second part (random perturbations) you should plot |q(x) - p(x)|,

where q is the "perturbed polynomial", the polynomial that interpolates

the perturbed f_i values.

In 1(b) just plot p(x), but make a separate plot for the Chebyshev and equidistant cases.