Z₁(1,3)= |fx(1, 3) = s fy(1, 3) = q x₁(1, 3) = c|yµ(1, 3) = −3| |ƒx(2, 2) = pƒy(2, 2) = bx, (1, 3) = 1 y(1, 3) = 2

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Select the option that gives a list of the stationary points of the function ƒ(x, y) = x³ – 3x² − 3xy² + 18xy – 24x – 1. Select one: O (0, 2), (0, 4), (1, 3) (1, 2), (1, 4), (0, 3) (1, 4), (0, 3) (2, 0), (4, 0), (3, 1) O (2, 1), (4, 1), (3, 0)

Find fy(x,y) if f(x,y) = 7x2 +5y2 -6. fxy (x.y) =

If fxy (x, y) = y for 0 2X – 2) =

Find fy (-1,-4,-2) if f(x, y, z) = x³ z4 + 2xy – y? z + 1.

Let f(x, y, z) = x³ +5x²yz +3xz + 3, v = Then: Duf(a) = 201 0 -2 and a = -5 2 -5

Let f(x, y) = 2x - 4y + 7. Find the following. (a) f(3,-1) (b) f(-5, 1) (c) f(-5, -4) (d) f(0, 7)

f(x, y) = /4x? + 2y² f-( – 3, 1) = |

,2,,2 Suppose that f(x, y) = 10x²y² + 6x? + 2y? then find the discriminant of f.