1. We can generalize our approach to work for d_xy state function. Consider :f=3x³−2xy²

for x_i=1, y_i=2

x_f=5, y_f=5

Confirm whether Δf= (f_f−f_i) is the scheme by calculating f_i and f_f, then taking the difference;

(b) Using the sum

Δf=_xi∫^xf(∂x/∂f)_ydx+_yi∫^yf(∂y/∂f)_xdy