Atotal of 4000 cars were sold at a car dealership 480 honda civic‘s were sold and 1200 mazdas were sold what percentage of the cars were mazda

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