Warning: Explicit integral could not be found. 求高手解答int()定积分问题syms Dd Dd0 x y z Wn theta Ue Ve n s p qDd0=10^(-3);Wn=((2*n+1).*pi.*x.*Dd0)/(3.6);Dd=Dd0.*tanh(1.76.*sqrt((1/x)-1));Ue=sqrt((1+sqrt(1+(Dd^2.*(sin(2.*theta)).^2)./(Wn.

Explicit matlab解不了这个简单的微分方程dequ='D2y=-GM/(y^2)'y=dsolve(dequ,'y(0)=R0','t')运行结果：Warning:Explicit solution could not be found.> In dsolve at 101怎么回事? matlab 想求出p(x,y)=0和q(x,y)=0的解[x0,y0] 为什么报错,说有三个变量?syms x y;p=-y+y^3;q=x;[x0,y0]=solve(p,q,'x','y')报错Warning:1 equations in 3 variables.New variables might be introduced.Warning:Explicit solution could not be foun LINGO里面explicit variablerror code 42:text:explicit variable in set condition for set:PAIRS 用matlab算比较复杂的式子,出现Warning:Explicit solution could not be found.还是方法不行 多元线性方程的求解 Matlab程序如下,但一直无法得到结果.对于下面这个方程,解应该是[0,0,0]Warning:Explicit solution could not be found.> In solve at 81In solve_diff at 11Comma separated list expansion has cell syntax for matlab编程 >>syms x >>int('(sin(x)*cos(x))^(1/3)',x,pi,-pi) 为什么没办法实现?Warning: Explicit integral could not be found.> In sym.int at 58 ans = int((cos(x)*sin(x))^(1/3),x = pi .. -pi)我想知道正确程序和错在什么地方,谢谢 matlab中怎么把积分函数 int 得到的不定积分式代入 solve 函数中进行计算?例如：syms r xfun=int(r*exp(-2*(r/2)^2),r,0,x);x=solve('fun-0.5','x');运行将会报错：Warning:Explicit solution could not be found.> In solve at 81 请问在matlab中怎么用一个变量来表示另一个变量?我编的程序如下,哪里错了?solve('522875.82*0.9457383^(t/12-1/2)+656366.01*0.995242^(t-6)+x-1103943.07=0','t')Warning:Explicit solution could not be found.> In solve at 81ans =[ 请教用matlab求方程符号解的问题我现在要用matlab求一个方程的符号解casein=solve('x^(0.12/0.88)+x+a','x')执行后程序返回Warning: Explicit solution could not be found.> In solve at 140 casein = [ empty sym ]但是如果把 ∫（xsinx）（arctan（e^x))dx 用matlab怎么算>> syms x; int((x*sin(x))*atan(exp(x))/(1+(cos(x))^2)) Warning:Explicit integral could not be found.> In sym.int at 58 ans = int(x*sin(x)*atan(exp(x))/(1+cos(x)^2),x) 我用一般的方法算不出 dy/dx=√(2*(y^3/3+0.9711-y)) 如何用matlab求解出不定积分用desolve求解的话会出现以下几个问题1.>> dsolve('Dy=(2*(y^3+1-y+0.9711))^0.5')Warning:Explicit solution could not be found; implicit solution returned.> In dsolve at 310an 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 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积分出错:Explicit integral could not be found.syms x;int((cos(pi*cos(x))+1)^2/sin(x),0,pi)Warning:Explicit integral could not be found.有什么其他的方法,可以找到这个积分的解? matlab中>> clear; >> syms x; >> int((sin(x)/(x^9-1)))Warning:Explicit integral could not be found.该不定积分不知道哪错了 用matlab解含参变量的方程组x,y是需要输入的变量,运行syms x,y,A,C;x=3;y=3;[A,C]=solve('x*sin(A*pi/180)=y*sin(C*pi/180)','A+C=90')报错是y =3A =[ empty sym ]Warning:Explicit solution could not be found.> In solve at 98In jisuann at explicit mandate