How do i plot 3 langrange polinomials in one figure?

f(x)=cos(πx) xo=1/5 x1=3/2 x2=2

Answer 1

[John D'Errico]

Do you know how to plot ONE such polynomial? I hope so. If you do, then you need to use the hold command. That is, after you plot the first polynomial, use

hold on

That allows you to continue plotting new things on the same figure, instead of creating a new figure each time.