Use the MATLAB function fnewton to find a root of
x1.4−√x+1/x−100=0
given an initial approximation 50. Use an accuracy of 10−4. Find the two real roots of |x3|+x −6=0 using the MATLAB function fnewton. Use initial approximations−1 and 1 and an accuracy of 10−4. Plot the function using MATLAB to verify that the equation has only two real roots. Hint: Take care in finding the derivative of the function. Explain why it is relatively difficult to find the root of tanx−c=0 when c is a large. Use the MATLAB function fnewton, with initial approximations 1.3 and 1.4 and accuracy 10−4, to find a root of this equation when c=5 and c=10. Compare the number of iterations required in both cases. Hint: A MATLAB plot will be useful.
