Atree grows 1 3/4 feet per year. how long will it take the tree to grow from a height of 21 1/4 feet to a height of 37 feet?

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis