这个图的公式除了λ其他都是已知的，于是我直接简化在matlab里输入
syms x
x=solve('10(1-exp(-15/x))/15(1-exp(-10/x))','x')

弹出来：
警告: Support of strings that are not valid variable names or define a number will be removed in a future release. To create
symbolic expressions, first create symbolic variables and then use operations on them.
> In sym>convertExpression (line 1536)
  In sym>convertChar (line 1441)
  In sym>tomupad (line 1198)
  In sym (line 177)
  In solve>getEqns (line 405)
  In solve (line 225)
警告: Do not specify equations and variables as character strings. Instead, create symbolic variables with syms.
> In solve>getEqns (line 445)
  In solve (line 225)

x =

Empty sym: 0-by-1

想请问matlab能不能这样算未知数


XG(@LRW[3[JNQ2JTQPVKKST.png 返回小木虫查看更多