Write the Chain Rule formula for the following composition using a tree diagram
z = g(x,y),
where x = x(r,?), y = y(r,?). Write formulas for the partial derivatives ?z/?r and ?z/ ??. Use them to answer the following question: find first partial derivatives of the function z=ex +yx2, in polar coordinates, that is find ?z/?r and ?z/ ?? as a function of polar coordinates (r,?).