(∂f(x,y))/∂x=Axy+Bx^2;
Meka Anukalanaya karanawa x wishayen....Partial defferentiate karaddi aneth variable eka ganan ganne ne wage...Aneth paththata y ganan nogena Anukalanaya karanawa.......
f(x,y)=Ayx^2/2+Bx^3/3+f(y)
Habai Abimatha niyathaya y matha rada pawathinawa...Eka niyathaknewei..Ei...