返回空值。。。。怎么办？

wypjyq

M(T)=Inf-271168454567635./2251799813685248.*i.*erf(4319490844306979./2251799813685248.*i.*T-8171018849268851./281474976710656.*i)
+ f: q: k6 {0 k- ]1 g0 w6 b3 @- wsolve('2*M(2*T-5)-M(T-5)+8*T*(1/(sqrt(2)*2.7128))*exp((2*T-5-15.1333)^2/2*2.7128^2-T*(1/(sqrt(2)*2.7128))*exp((*T-5-15.1333)^2/2*2.7128^2=0',T)
Warning: Empty equation
( ?4 M2 z3 o  L7 y3 N; `> In dsolve at 81

ans =
' P0 b# Y; f/ r' z' a9 O3 F; q
[ empty sym ]

杨帆

谢谢分享。。。