I have to solve the following exercise:
Use the Wronskian to check whether the given set of functions is linearly dependent:
$$f_1(t) = 2t -3, \,f_2(t) = 2t^2 +1, \,f_3(t) = 3t^2 + t$$
How should I solve this exercise? I only know how to use the Wronskian for a system that is at least $2\times 2$!
Edit: I understand that if $f_1$ and $f_2$ are of dimension $n$, $n>1$, that in order to check whether they're linearly dependent we can look at the determinant of the resulting system. What I don't understand is that if $f_1$ and $f_2$ are one-dimensional we can just look at the determinants of $f_1$ and $f_2$. I only need to show linear (in)dependence between $f_1$ and $f_2$, not between $f = [f_1, f'_1]$ and $g = [f_2,f'_2]$, right?