So this implies and also you can extend as even function so you have , okay. So satisfies the heat equation, you can see this this satisfies the heat equation already and this is also satisfying as double derivatives will be positive so this will also satisfy the heat equation.
ஆகவே இதுவும்,ஹீட் ஈக்குவேஷன்-ஐ சாடிஸ்ஃபை பண்ணுகிறது.