how solve 1 unknown varible function?
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hi, i am new at matlab and i am having troubles with fsolve.
>> fsolve('(2x+4)/(x+2)=5','x') ??? Error using ==> fsolve at 148 FSOLVE only accepts inputs of data type double.
采纳的回答
Oleg Komarov
2012-1-6
fsolve(@(x) (2*x+4)/(x+2)-5,0)
And the equation you propose has no solution because x+2 simplifies away
2 个评论
denis
2012-1-6
Oleg Komarov
2012-1-6
As in the example, if you have x = 1, rewrite as:
@(x) x-1
Then:
fsolve(@(x) x-1, X0) for some initial value X0
NOTE: no apostrophes
更多回答（1 个）
Walter Roberson
2012-1-6
If you have the symbolic toolbox, use solve() instead of fsolve()
solve('(2x+4)/(x+2)=5','x')
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