"Please Answer both parts
There are two questions but they are long. For z=f(x,y), each question x = r cos 0 y = rsin A and 1. (4 points) Show that 2 2 (DE) ² (2) ² ду 2. (6 points) Show that 8² z მე2 + - 2 2 (01²) �"

Q&A Education