MATLAB积分求助,积分结果怎么有了复数k=8.617e-5;T=6000;syms Ef=E^2./(exp(E/(k*T))-1);b=int(f,1.12,inf);c=pi*b*5.04e+7c =50400000*pi*limit(-1/3*E^3+25851/50000*E^2*log(1-exp(50000/25851*E))+668274201/1250000000*E*polylog(2,exp(50000/25851*
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![MATLAB积分求助,积分结果怎么有了复数k=8.617e-5;T=6000;syms Ef=E^2./(exp(E/(k*T))-1);b=int(f,1.12,inf);c=pi*b*5.04e+7c =50400000*pi*limit(-1/3*E^3+25851/50000*E^2*log(1-exp(50000/25851*E))+668274201/1250000000*E*polylog(2,exp(50000/25851*](/uploads/image/z/5164796-20-6.jpg?t=MATLAB%E7%A7%AF%E5%88%86%E6%B1%82%E5%8A%A9%2C%E7%A7%AF%E5%88%86%E7%BB%93%E6%9E%9C%E6%80%8E%E4%B9%88%E6%9C%89%E4%BA%86%E5%A4%8D%E6%95%B0k%3D8.617e-5%3BT%3D6000%3Bsyms+Ef%3DE%5E2.%2F%28exp%28E%2F%28k%2AT%29%29-1%29%3Bb%3Dint%28f%2C1.12%2Cinf%29%3Bc%3Dpi%2Ab%2A5.04e%2B7c+%3D50400000%2Api%2Alimit%28-1%2F3%2AE%5E3%2B25851%2F50000%2AE%5E2%2Alog%281-exp%2850000%2F25851%2AE%29%29%2B668274201%2F1250000000%2AE%2Apolylog%282%2Cexp%2850000%2F25851%2A)
MATLAB积分求助,积分结果怎么有了复数k=8.617e-5;T=6000;syms Ef=E^2./(exp(E/(k*T))-1);b=int(f,1.12,inf);c=pi*b*5.04e+7c =50400000*pi*limit(-1/3*E^3+25851/50000*E^2*log(1-exp(50000/25851*E))+668274201/1250000000*E*polylog(2,exp(50000/25851*
MATLAB积分求助,积分结果怎么有了复数
k=8.617e-5;
T=6000;
syms E
f=E^2./(exp(E/(k*T))-1);
b=int(f,1.12,inf);
c=pi*b*5.04e+7
c =
50400000*pi*limit(-1/3*E^3+25851/50000*E^2*log(1-exp(50000/25851*E))+668274201/1250000000*E*polylog(2,exp(50000/25851*E))-17275556370051/62500000000000*polylog(3,exp(50000/25851*E))+21952/46875-1266699/1953125*log(-1+exp(8000/3693))-1266699/1953125*i*pi-4677919407/7812500000*polylog(2,exp(8000/3693))+17275556370051/62500000000000*polylog(3,exp(8000/3693)),E = Inf,left)
>> double(c)
ans =
2.8783e+007 -1.1302e-053i
MATLAB积分求助,积分结果怎么有了复数k=8.617e-5;T=6000;syms Ef=E^2./(exp(E/(k*T))-1);b=int(f,1.12,inf);c=pi*b*5.04e+7c =50400000*pi*limit(-1/3*E^3+25851/50000*E^2*log(1-exp(50000/25851*E))+668274201/1250000000*E*polylog(2,exp(50000/25851*
2.8783e+007 -1.1302e-053i
这都是10的-53次方乘以i了,可以看作 0
我的运行如下
>> k=8.617e-5;
T=6000;
syms E
f=E^2./(exp(E/(k*T))-1);
b=int(f,1.12,inf);
c=pi*b*5.04e+7
Warning:Explicit integral could not be found.
c =
50400000*pi*int(E^2/(exp((50000*E)/25851) - 1),E = 28/25..Inf)
>> double(c)
ans =
2.8783e+007
>>