A)Express the domain using interval notation. b)Express the range using interval notation.

I believe that part of the answer is [-9,6) for domain and [2,3) for range but I don’t understand how I’m supposed to write it if the graph has more than 2 different points.

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