Numerical Methods
Finding a zero of a function
Binary Search Method
f(2) < 0, f(3) > 0.
There must be a zero between 2 and 3. Try x = 2.5.
f(2.5) > 0.
The zero must be between 2 and 2.5. Try 2.25.
The binary search method takes 3 or 4 iterations to obtain one more decimal place.