Let a and b be real numbers, where Which of the following functions could represent the graph on the right?

f(x) = x (x – a)(x – b)2

f(x) = (x – a)(x – b)2

f(x) = x(x – a)³(x – b)

f(x) = x2(x – a) 2(x – b)2

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