Pyro Tech uses a function h(t) that estimates the rockets height above ground in terms of time + since the launch. If + is in seconds and h(t) is in feet, then h(t) = -16+2 + 64+ + 80 150​

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