hello all,

I have a tough past exam question that I can not seem to fully understand. If we use newtons method to approx by looking for the 0 of the function defined by , the sequence as to is generated, where = 1 and = .

The question states that show that if:

, then .

- Hint: add , and complete the square.

Not sure how to approach this one, but using the hint would I do something like..

= ..

Thanks..