How do I find ALL of the positive roots of exp(-0.2*x)*cos(2*x)-0.15*x^2+1?
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
I enter this into Matlab but I only receive back one of its positive roots and I know it has at least three.
syms x,
y=exp(-0.2*x)*cos(2*x)-0.15*x^2+1;
sol=solve(y)
0 Commenti
Risposta accettata
Walter Roberson
il 11 Apr 2014
It has exactly three.
The easiest way is to plot the function, observe the approximate crossings, and run a numeric solver that is constrained to each range in turn.
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Matrices and Arrays in Help Center e File Exchange
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!