Suppose $\displaystyle y_1$ and $\displaystyle y_2$ are solutions of $\displaystyle y''+p(x)y'+q(x)y=r(x)$, with p, q, and r being continuous functions of x. If $\displaystyle y_1$ and $\displaystyle y_2$ are linearly independent on an interval, is it possible to still get a Wronskian of 0 (id est$\displaystyle x^2$ and $\displaystyle x|x|$)?