matlab 求解 f(x)=x(x+1)(x+2)(x+3)(x+4)...(x+n-2)(x+n-1)(x+n)的导数;
matlab 求解 f(x)=x(x+1)(x+2)(x+3)(x+4)...(x+n-2)(x+n-1)(x+n)的导数;
问题的提出

代码求解
clc; clear; close all;
filename='how10.txt';
syms x; % be careful performance issue.
fileID = fopen(filename, 'w');
str="x";
f=str2sym(str);
fprintf(fileID,'%s\r\n',string(f));
result=diff(f,x);
fprintf(fileID,'%s\r\n',string(result));
ff=matlabFunction(result);
fprintf(fileID,'%d\r\n',1);
fprintf(fileID,'\r\n');
for i = 1:10
newstr="*(x+"+int2str(i)+")";
str=str+newstr;
f=str2sym(str);
fprintf(fileID,'%s\r\n',string(f));
result=diff(f,x);
fprintf(fileID,'%s\r\n',string(result));
ff=matlabFunction(result);
fprintf(fileID,'%f\r\n',ff(0));
fprintf(fileID,'\r\n');
end
代码输出
x 原函数 
1 导函数 
1 
x*(x + 1) 原函数 
2*x + 1 导函数 
1.000000 
x*(x + 1)(x + 2)
(x + 1)(x + 2) + x*(x + 1) + x*(x + 2)
2.000000
x*(x + 1)(x + 2)(x + 3)
x*(x + 1)(x + 2) + x(x + 1)(x + 3) + x(x + 2)(x + 3) + (x + 1)(x + 2)*(x + 3)
6.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)
x(x + 1)(x + 2)(x + 3) + x*(x + 1)(x + 2)(x + 4) + x*(x + 1)(x + 3)(x + 4) + x*(x + 2)(x + 3)(x + 4) + (x + 1)(x + 2)(x + 3)*(x + 4)
24.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)
x*(x + 1)(x + 2)(x + 3)(x + 4) + x(x + 1)(x + 2)(x + 3)(x + 5) + x(x + 1)(x + 2)(x + 4)(x + 5) + x(x + 1)(x + 3)(x + 4)(x + 5) + x(x + 2)(x + 3)(x + 4)(x + 5) + (x + 1)(x + 2)(x + 3)(x + 4)*(x + 5)
120.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)
x(x + 1)(x + 2)(x + 3)(x + 4)(x + 5) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 6) + x*(x + 1)(x + 2)(x + 3)(x + 5)(x + 6) + x*(x + 1)(x + 2)(x + 4)(x + 5)(x + 6) + x*(x + 1)(x + 3)(x + 4)(x + 5)(x + 6) + x*(x + 2)(x + 3)(x + 4)(x + 5)(x + 6) + (x + 1)(x + 2)(x + 3)(x + 4)(x + 5)*(x + 6)
720.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)
(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6) + x(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 7) + x(x + 1)(x + 2)(x + 3)(x + 4)(x + 6)(x + 7) + x(x + 1)(x + 2)(x + 3)(x + 5)(x + 6)(x + 7) + x(x + 1)(x + 2)(x + 4)(x + 5)(x + 6)(x + 7) + x(x + 1)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7) + x(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)*(x + 7)
5040.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)
(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 8) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 7)(x + 8) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 6)(x + 7)(x + 8) + x*(x + 1)(x + 2)(x + 3)(x + 5)(x + 6)(x + 7)(x + 8) + x*(x + 1)(x + 2)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8) + x*(x + 1)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8) + x*(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)
40320.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8) + x(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 9) + x(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 8)(x + 9) + x(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 7)(x + 8)(x + 9) + x(x + 1)(x + 2)(x + 3)(x + 4)(x + 6)(x + 7)(x + 8)(x + 9) + x(x + 1)(x + 2)(x + 3)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9) + x(x + 1)(x + 2)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9) + x(x + 1)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9) + x(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9) + (x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)*(x + 9)
362880.000000
x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)(x + 10)
x(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 10) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 9)(x + 10) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 8)(x + 9)(x + 10) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 7)(x + 8)(x + 9)(x + 10) + x*(x + 1)(x + 2)(x + 3)(x + 4)(x + 6)(x + 7)(x + 8)(x + 9)(x + 10) + x*(x + 1)(x + 2)(x + 3)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)(x + 10) + x*(x + 1)(x + 2)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)(x + 10) + x*(x + 1)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)(x + 10) + x*(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)(x + 10) + (x + 1)(x + 2)(x + 3)(x + 4)(x + 5)(x + 6)(x + 7)(x + 8)(x + 9)*(x + 10)
3628800.000000
分析代码结果
可以看出来
结果为
matlab 求解 f(x)=x(x+1)(x+2)(x+3)(x+4)...(x+n-2)(x+n-1)(x+n)的导数;的更多相关文章
- matlab 求解线性规划问题
线性规划 LP(Linear programming,线性规划)是一种优化方法,在优化问题中目标函数和约束函数均为向量变量的线性函数,LP问题可描述为: minf(x):待最小化的目标函数(如果问题本 ...
- fslove - Matlab求解多元多次方程组
fslove - Matlab求解多元多次方程组 简介: 之前看到网上的一些资料良莠不齐,各种转载之类的,根本无法解决实际问题,所以我打算把自己的学到的总结一下,以实例出发讲解fsolve. 示例如下 ...
- 用Matlab求解微分方程
用Matlab求解微分方程 解微分方程有两种解,一种是解析解,一种是数值解,这两种分别对应不同的解法 解析解 利用dsolve函数进行求解 syms x; s = dsolve('eq1,eq2,.. ...
- MATLAB求解代数方程、微分方程的一些常用指令
MATLAB版本:R2015b 1.求解符号矩阵的行列式.逆.特征值.特征向量 A = sym('[a11, a12; a21, a22]');deltaA = det(A)invA = inv(A) ...
- MATLAB求解二重积分案例
凯鲁嘎吉 - 博客园 http://www.cnblogs.com/kailugaji/ 定积分解决的是一维连续量求和的问题,而解决多维连续量的求和问题就要用到重积分了.重积分是建立在定积分的基础上的 ...
- yalmip + lpsolve + matlab 求解混合整数线性规划问题(MIP/MILP)
最近建立了一个网络流模型,是一个混合整数线性规划问题(模型中既有连续变量,又有整型变量).当要求解此模型的时候,发现matlab优化工具箱竟没有自带的可以求解这类问题的算法(只有bintprog求解器 ...
- MATLAB求解常微分方程:ode45函数与dsolve函数
ode45函数无法求出解析解,dsolve可以求出解析解(若有),但是速度较慢. 1. ode45函数 ①求一阶常微分方程的初值问题 [t,y] = ode45(@(t,y)y-2*t/y, ...
- MATLAB求解非线性方程组
matlab中有专门的solve函数来解决方程组的(a-x)^2+(b-y)^2=e^2(C-x)^2+(D-y)^2=v^2已知a,b,c,d,e,v 值求解 X,Y 请问用 matlab 如何写, ...
- matlab 求解 Ax=B 时所用算法
x = A\B; x = mldivide(A, B); matlab 在这里的求解与严格的数学意义是不同的, 如果 A 接近奇异,matlab 仍会给出合理的结果,但也会提示警告信息: 如果 A 为 ...
- [Matlab]求解线性方程组
转自:http://silencethinking.blog.163.com/blog/static/911490562008928105813169/ AX=B或XA=B在MATLAB中,求解线性方 ...
随机推荐
- shell 脚本请求接口报错
2023-01-18 22:07:07.984 WARN 11700 --- [io-9044-exec-10] .w.s.m.s.DefaultHandlerExceptionResolver : ...
- C++ CLI string
String^ to std::string ` include <msclr\marshal_cppstd.h> marshal_as(String^) `
- Java程序(数组扩容的尝试)
import java.util.Scanner; public class ArrayAdd { public static void main(String[] args) { int arr[] ...
- VirtualBox + Parrot
安装环境:win8 1.官网下载virtualbox安装包,parrot kde sequrity镜像文件 2.用virtualbox创建新的虚拟机,内存4g,类型是linux debian 64,硬 ...
- 小程序微信支付完整demo,包含退款
最近刚完成一个商场小程序(http://market.zhenzikj.com/detail/121.html), 使用到了微信支付功能,其中遇到了很多的抗,所以,我把支付这块摘出来,以免大家少走弯路 ...
- swift中的进制转换,以及玩转二进制
swift中的进制转换,以及玩转二进制 在日常开发中我们很少用到进制转换,或操作二进制的情况.但是如果你处理一些底层的代码,你会经常与二进制打交道,所以接下来我们先来了解一下二进制. 二进制(bina ...
- Quartz 2D CGPattern学习笔记
CGPattern是在图形上下文中重复绘制的一系列绘制操作.你可以像使用颜色一样使用图案.当使用CGPattern进行绘制时,Quartz将页面划分为一组图案单元格,每个单元格的大小为CGPatter ...
- ES-分页查询
从一个分页问题开始 做分页查询,当分页达到一定量的时候,报如下错误 Result window is too large, from + size must be less than or equal ...
- webssh
目录 使用 jupyter notebook 使用webssh GateOne 使用 jupyter notebook pip install jupyter ipyton # 启动 jupyter ...
- 1067- invalid default value for ""
创建表时报的,一个时间字段类型是datetime,一保存就报错,网上说是datetime类型只支持mysql 5.6.5+,我看了下我的版本,5.8的,没什么问题,然后找了许久找到了错误的地方. 很蠢 ...