Not quite right

Robert Israel — Tue, 01 Nov 2011 07:55:51 Z

There are several things wrong with your

G:= x-> x - (F)/(Fd);

Your F is a function, so you'd need F(x) rather than (F).

On the other hand, Fd is an expression, and while it contains x that is not the x that is the formal parameter of G. You can use unapply to make an expression into a function. Thus:

G:= unapply(x - F(x)/Fd, x);

Now G is a function, and you use it like any other function, by putting its argument(s) in parentheses after the G. Thus you could say

x[1]:= evalf(G(x[0]));

and similarly in your loop

x[i]:= evalf(G(x[i-1]));

Finally,

print(accuracy not reached)

won't work because you need quotes " " around a string. It could be

print("accuracy not reached")

MaplePrimes - answers and comments on Question, Newton's Method in Maple

Not quite right