Find the derivative efthe function at P0 in the direction of A. f{x:y)=2xy+5y2: Pawn5}: A=9i+21 (W) {4:53 = E (Type an exact answer, using radicals as needed.) Find the derivative efthe function at P0 in the direction of u. XY 3xy+5' grim}: Par1:1). u=12i+5j [DUB] { _ 1'1]. = D {Simplify your answer.)