The bisection method is used to find a zero x0 of the polynomial f(x) = x3 - x2 - 1. Since f(1) = -1, while f(2) = 3, the values a = 1 and b = 2 are chosen as the boundaries of the interval in which the x0 lies. If the bisection method is iterated three times, the resulting value of x0 is
1
15/8
2
13/8
3
11/8
4
9/8