A system goes from A and B via two processes. I and II as shown in figure. If `DeltaU_1 and DeltaU_2` are the changes in internal energies in the processes I and II respectively, then

Explanation

As initial and final states A and B for the two processes are the same for two processes and change in internal energy is independent of the path,
`:. dU_(1)=dU_(2)`