Hello ! I'm actually using the function " solve ", but instead of returning an expression, i get the following : "
9
root(z^4 - (10*z^3)/9 - z^2/6561 - z/729 - 91/6561, z, 1)
root(z^4 - (10*z^3)/9 - z^2/6561 - z/729 - 91/6561, z, 2)
root(z^4 - (10*z^3)/9 - z^2/6561 - z/729 - 91/6561, z, 3)
root(z^4 - (10*z^3)/9 - z^2/6561 - z/729 - 91/6561, z, 4)
These are indeed the solutions, but why it doesn't express it ? If i use the function " roots " with a vector with the above coefficient, it gives me the solution numerically. Anyone have a way to either get the answer numerically, or to extract the coeffcient of the above expression automatically ? In any case, here is the simple code :
clear all
syms a
b=9;h=0.1;
t2=a^4*b^3-b-h*(b^3-b^5*a^4)-(b^4*a^3-a-h*(a^3-b^4*a^5))
sol=solve(t2,a)
Thanks !
