Let A be a given positive constant and g(x)=2x-Ax^2
a. Show that if fixed-point iteration converges to a nonzero limit, then the
limit is p=1/A, so the reciprocal of a number can be found using only
multiplications and subtractions
b. Find an interval about 1/A for which fixed-point iteration converges,
provided p0 is in the interval
Can any one help with this problem