steave sir,

please delete above messege from the thread it has a misleading and wrong information.

Bisection method starts with two guesses say x0 and x1 such that f(x) has opposite sign for both the guesses, between which root can fall and calculates the avarage of old guess and the new one and replalces one of the old guesses with new one. The replacement is done on the basis of sign of f(x).

abhishek