Find the tangent plane to the equation z = - 4x² - 5y² + 4y at the point (0, 1, -1)
z = ____
Find the tangent plane to the equation z = 6e^x²-4y at the point (8, 16, 6) z = ____
Find the tangent plane to the equation z = 6y cos(5x-2y) at the point (2,5,30) z= ____ Find the linear approximation to the equation f(x, y) = 4√xy/6 at the point (4,6,8), and use it to 6 approximate f(4.3, 6.24) f(4.3, 6.24) ≈