$\text{ Let }\mathrm{f}:[0,1]\to \mathrm{R}\text{ be such that }\mathrm{f}\left(\mathrm{xy}\right)=\mathrm{f}\left(\mathrm{x}\right)\mathrm{f}\left(\mathrm{y}\right)\mathrm{\forall }\mathrm{x},\mathrm{y}\in [0,1]\text{ and }\mathrm{f}\left(0\right)\ne 0\text{ . If }\mathrm{y}=\mathrm{y}\left(\mathrm{x}\right)$ $\text{ satisfies the differential equation }\frac{\mathrm{dy}}{\mathrm{dx}}=\mathrm{f}\left(\mathrm{x}\right)\text{ with }\underset{\_}{\mathrm{y}}\left(0\right)=1\text{ then }\mathrm{y}(1/4)+\mathrm{y}(3/4)\text{ is }$