www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/DifferentiateProductOfPolynomialsExample.m
%% Differentiate Product of Polynomials % Create two vectors to represent the polynomials $a(x)=x^4-2x^3+11$ and % $b(x)=x^2-10x+15$. % Copyright 2015 The MathWorks, Inc. a = [1 -2 0 0 11]; b = [1 -10 15]; %% % Use |polyder| to calculate % % $$q(x)=\frac{d}{dx} \left[ a(x)b(x) \right].$$ % q = polyder(a,b) %% % The result is % % $$q(x)=6x^5-60x^4+140x^3-90x^2+22x-110.$$ %