F(x) = 2 + 2 – 2 and g is a vertically scaled version of f. The functions are graphed where f is solid and g is dashed.
y

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