Question: A call of the form root - fzero('f' ,xO) can be used to compute a zero of the function I(x) near x = xo. Write a MATLAB function z - cubeRoot (a) that uses fzero to compute the cube root of a. (You cannot just set z - z-(1/3).) Notice that if x is the cube root of a then x 3 = a. You may assume that 1 ~ a ~ 8 and that (6 +a)/7 is a good initial guess for the required root.
Hint: You will have to write a second function whose name is passed to fzero. Be sure to indicate clearly any global variables that are required by your solution.