wypjyq 发表于 2009-7-22 17:59

返回空值。。。。怎么办？

M(T)=Inf-271168454567635./2251799813685248.*i.*erf(4319490844306979./2251799813685248.*i.*T-8171018849268851./281474976710656.*i)
solve('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
> In dsolve at 81

ans =

[ empty sym ]

杨帆 发表于 2010-8-14 14:40

谢谢分享。。。
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