matlab 解函数.为什么解不出来?图像都画出来了.solve(D/(0.145*D+5.25)-0.1348)警告:List of equations is empty.> In solve at 153 ans =[ empty sym ]solve('D/(0.145*D+5.25)-0.1348')警告:1 equations in 0 variables.> In C:\Program Files\M

matlab 解函数.为什么解不出来?图像都画出来了.
solve(D/(0.145*D+5.25)-0.1348)
警告:List of equations is empty.
> In solve at 153
ans =
[ empty sym ]
solve('D/(0.145*D+5.25)-0.1348')
警告:1 equations in 0 variables.
> In C:\Program Files\MATLAB\R2012a\toolbox\symbolic\symbolic\symengine.p>symengine at 54
In mupadengine.mupadengine>mupadengine.evalin at 97
In mupadengine.mupadengine>mupadengine.feval at 150
In solve at 160
警告:Explicit solution could not be found.
> In solve at 169
ans =
[ empty sym ]

哥们,我又来了,你的命令不对
>> solve('D/(0.145*D+5.25)-0.1348','D')
ans =
.72180846832181825970417786046056
搞定