I'll do the second part . . . it's trickier.
And I believe there's an extra "4" is the answer . . .
Consider the function:
(b) Show that for this function , the Newton- Raphson method formula
can be expressed as: . ? for
I'm going to drop the subscripts (temporarily) . . .
We have: .
Multiply top and bottom of the fraction by
Get a common denominator: .