... H. McCuen, Numerical Methods for Engineers, Bourg, David M., Excel ScientiJc and Engineering Cookbook, OReilly, 2006. Chapra, Steven C. and Raymond P. Canale, Numerical Methods for Engineers, ... Mathematics in Chemistry, Prentice-Hall, 1990. Hoffman, Joe D., Numerical Methods for Engineers and Scientists, McGraw-Hill, Johnson, K. Jeffrey, Numerical Methods in Chemistry, Marcel Dekker, ... derivative formula, compared to the two-point formula. You can experiment with different coefficients for the cubic by changing the values on the worksheet. I used the custom function for this...