matlab 求积分>> syms x>> 1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2)ans =447/250*x/(25+x^2)*exp(-62500/6241*log(1/20*x)^2)>> int(f,x,0,Inf)Warning:Explicit integral could not be found.> In sym.int at 58ans =int(447/250*x/(25+x^2)*(6121026901143963/

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/15 01:12:04
matlab求积分>>symsx>>1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2)ans=447/250*x/(25+x^2)*exp(-62500/6241*l

matlab 求积分>> syms x>> 1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2)ans =447/250*x/(25+x^2)*exp(-62500/6241*log(1/20*x)^2)>> int(f,x,0,Inf)Warning:Explicit integral could not be found.> In sym.int at 58ans =int(447/250*x/(25+x^2)*(6121026901143963/
matlab 求积分
>> syms x
>> 1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2)
ans =
447/250*x/(25+x^2)*exp(-62500/6241*log(1/20*x)^2)
>> int(f,x,0,Inf)
Warning:Explicit integral could not be found.
> In sym.int at 58
ans =
int(447/250*x/(25+x^2)*(6121026901143963/2251799813685248)^(-62500/6241*log(1/20*x)^2),x = 0 ..Inf)

matlab 求积分>> syms x>> 1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2)ans =447/250*x/(25+x^2)*exp(-62500/6241*log(1/20*x)^2)>> int(f,x,0,Inf)Warning:Explicit integral could not be found.> In sym.int at 58ans =int(447/250*x/(25+x^2)*(6121026901143963/
>> syms x
f=1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2);
I=int(f,x,0,inf);
double(I)
ans =
0.9376
>>

matlab求积分syms x; a=int(1/(1-x^2)*(log(1+x)-log(1-x)); a 为什么用matlab求这个积分算不出来啊 syms x; int(sqrt(1+pi^2*cos(x).^2),0,2); 关于MATLAB求定积分如果我有了一个inline函数f = inline('some_expression'),如何求x*f(x)从a 到b上的定积分(使用纯数值办法,不要用syms之类的符号运算) matlab 关于inline的问题我不懂matlab,想用它求个积分,但遇到个很久结的问题,我想用matlab求函数y=x2(x的平方)的定积分,积分区间从1到2,下面是我的程序:format long syms x;w=x.^2;f=inline('w');a=quad(f,1, matlab怎样用int法求解定积分,求帮找错>> clear>> syms x>> S=int('sin(x)/x',x,0,1)S =sinint(1)怎么会出来这么个结果 求Matlab程序,我的程序运行不了,求 a*x^2+b*x+c关于x的定积分.Matlab程序怎么编!>>clear >>syms x>>f=sym(`a*x^2+b*x+c`)>>int(f,x,0,2) %表示表达式f在(0,2)的定积分,自变量是x.ans= 8/3*a+2*b+2*c matlab求积分:y=sin(x),t=y^2/(a+b*y),积分范围(0,pi),我是这样编写的: syms x a by=sin(x);int(y^2/(b*y+a),0,pi)结果显示:Warning: Explicit integral could not be found. 求高手指点下,错在哪里,我该怎么求这个积分 matlab 计算定积分怎么运行很慢,我的程序如下:syms x S2=sqrt(1+(1.767*x^2-3.68*x+2.74 matlab 变限积分 syms x T; F1=int('(-2.4)/exp((-0.008)*(x-720))(1+exp(0.008*(x-720)))^2',0,T) matlab求变上限积分对变量x的导数求下列变上限积分对变量x的导数 syms x a tf=sym('sqrt(a+t) '),int(f,x,x^2)错在哪里了? Warning:Explicit integral could not be found.ans =piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^ matlab 中,syms x 是不是相当于x=sym('x') matlab计算函数值,syms x y; y=2*x;如何求x=2时y的值 怎样用MATLAB求解定积分方程中的参变量?我有一个方程A=0,A含有一个定积分,其中L F是常量,u是积分变量,方程真正的参变量只有一个x,下面是我的程序,会出错,求大虾相助!syms x u L F;L = 1;F = 0.1;A = matlab求gamma函数不定积分.matlab >> syms t x >> t=int(t^(x - 1)/exp(t),t) //就是gamma函数 t = -igamma(x,t) 求大虾解释,-igamma(x,t)是什么样的函数啊?好像gamma函数不是初等函数,只能用积分形式给出。分给一 matlab 求积分>> syms x>> 1.788*x/(25+x^2)*exp(-(log(x/20)/0.316)^2)ans =447/250*x/(25+x^2)*exp(-62500/6241*log(1/20*x)^2)>> int(f,x,0,Inf)Warning:Explicit integral could not be found.> In sym.int at 58ans =int(447/250*x/(25+x^2)*(6121026901143963/ matlab求积分问题>> syms x>> int('1/(x*x*x+2*x*x+x+1)',x)ans =sum(b*log(b*(3*x - b*(2*x - 7) + 2)),b in RootOf(c^3 + c/23 - 1/23,c))这个结果看不懂啊b c是什么东西? MATLAB求积分的数值解我的程序及运行如下:>> syms x;>> y=inline('0.579/((2*pi*0.3176)^0.5*x^1.5)*exp(-(x-0.579)^2/(2*0.3176*x))','x');>> int(x*exp(-3*x)*y(x),x,0,inf)Warning:Explicit integral could not MATLAB求积分int('x.*log(1+x)',0,1)