Help Please

dy dx 6. sin(x) + cos(y) = sin(x) cos(y) Compute of the function 7. Find the relative MAX/MIN and Saddle points f(x, y ) = xy+ 12x - 8y f ( x, y ) = xy- x-2y 8. Find the absolute MAX/MIN of Subject to region is formed by the triangle with vertices at the points (1,0),(1,4), and (5,0). 9. f(x, y) = xy Find MAX/Min using Lagrange Multiplier of x2 + 2y2 = 6 Subject to lim x-y-1 10. ( x, y) - (2,1) x - y -1] Compute