The Newton-Raphson iteration $${{\text{x}}_{{\text{n}} + 1}} = \frac{1}{2}\left( {{{\text{x}}_{\text{n}}} + \frac{{\text{R}}}{{{{\text{x}}_{\text{n}}}}}} \right)$$    can be used to compute the

A. square of R

B. reciprocal of R

C. square root of R

D. logarithm of R

Answer: Option C