作业帮matlab解不出来 solve('-(0.7979*pi*t*(1/exp(800/t^2) - 1))=1000')； 结果是ans = [ empty sym ] 为什么>> t=2005.1419288982343910543561118913229;>> -(0.7979*pi*t*(1/exp(800/t^2) - 1))ans =1.0000你把t的值代入看是不是这么回事
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![matlab解不出来 solve('-(0.7979*pi*t*(1/exp(800/t^2) - 1))=1000')； 结果是ans = [ empty sym ] 为什么>> t=2005.1419288982343910543561118913229;>> -(0.7979*pi*t*(1/exp(800/t^2) - 1))ans =1.0000你把t的值代入看是不是这么回事](/uploads/image/z/10769301-45-1.jpg?t=matlab%E8%A7%A3%E4%B8%8D%E5%87%BA%E6%9D%A5+solve%28%27-%280.7979%2Api%2At%2A%281%2Fexp%28800%2Ft%5E2%29+-+1%29%29%3D1000%27%29%EF%BC%9B+%E7%BB%93%E6%9E%9C%E6%98%AFans+%3D+%5B+empty+sym+%5D+%E4%B8%BA%E4%BB%80%E4%B9%88%3E%3E+t%3D2005.1419288982343910543561118913229%3B%3E%3E+-%280.7979%2Api%2At%2A%281%2Fexp%28800%2Ft%5E2%29+-+1%29%29ans+%3D1.0000%E4%BD%A0%E6%8A%8At%E7%9A%84%E5%80%BC%E4%BB%A3%E5%85%A5%E7%9C%8B%E6%98%AF%E4%B8%8D%E6%98%AF%E8%BF%99%E4%B9%88%E5%9B%9E%E4%BA%8B)
matlab解不出来 solve('-(0.7979*pi*t*(1/exp(800/t^2) - 1))=1000')； 结果是ans = [ empty sym ] 为什么>> t=2005.1419288982343910543561118913229;>> -(0.7979*pi*t*(1/exp(800/t^2) - 1))ans =1.0000你把t的值代入看是不是这么回事
matlab解不出来 solve('-(0.7979*pi*t*(1/exp(800/t^2) - 1))=1000')； 结果是ans = [ empty sym ] 为什么
>> t=2005.1419288982343910543561118913229;
>> -(0.7979*pi*t*(1/exp(800/t^2) - 1))
ans =
1.0000
你把t的值代入看是不是这么回事
matlab解不出来 solve('-(0.7979*pi*t*(1/exp(800/t^2) - 1))=1000')； 结果是ans = [ empty sym ] 为什么>> t=2005.1419288982343910543561118913229;>> -(0.7979*pi*t*(1/exp(800/t^2) - 1))ans =1.0000你把t的值代入看是不是这么回事
你看,你写的方程里面是等于1000的,但是下面的答案代进去时等于1的.那个t当然不是答案啦.其实,你可以用MATLAB画一下图案,会发现方程左边的式子与y=1000根本没有交点,所以MATLAB的答案也是对的.