If m∠A = m∠B and m∠A + m∠C = m∠D, then m∠B + m∠C = m∠D. Which property is shown? reflexive property substitution property symmetric property transitive property

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