Finding a single root of x^(3.6)=75
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Hi, the question is to use MATLAB to determine the real root of x^3.6 = 75. I thought I could use the fzero code and wrote this code below but I keep getting an error and can't figure out why or if this is how I should approach this question.
fun = x^(3.6)-75;
x0=3;
z = fzero(fun,x0)
can anyone help?
3 commentaires
James Tursa
le 4 Oct 2022
FYI, when you post "... I keep getting an error ..." it is best to copy & paste the entire error message in your question so that we don't have to guess what the error is.
Réponses (1)
James Tursa
le 4 Oct 2022
Modifié(e) : James Tursa
le 4 Oct 2022
Make a function handle with the @ operator. E.g.,
fun = @(x) x^(3.6)-75;
x0=3;
z = fzero(fun,x0)
Check
z^3.6
Or you can raise both sides of original equation to (1/3.6) power to solve for x directly.
Or you can solve directly using log( ) function as Benjamin suggests. (Followed up by using the exp( ) function)
1 commentaire
Steven Lord
le 4 Oct 2022
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