Newton-Raphson Enter a valid function, its derivative and chart setting values below: Solver settings: f(x): Function to find a root for. f'(x):Derivative of f(x) function. x0:Your root-guess of f(x). Chart settings: xstep:Step to draw f(x) and f'(x) with. xmin:Chart left-most x-value. xmax:Chart right-most x-value. xroot:Estimated root of f(x). yroot:Should be very close to zero (root).