QUESTION 1 ( x 2 + y2) + sin (x2 +y2) Evaluate lim ( x , y) - (0,0) (x 2 + y2) QUESTION 2 f ( x, y, z) = (x2 + y2 + 1)z, find of (1,1,2) QUESTION 3 f (x,y, z)=(x2 +y2+1)z, find of z (1, 1,2) QUESTION 4 x'y- xy 3 if (x, y) # (0,0) f ( x, y ) = x2+ y 2 0 if (x, y) = (0,0) of evaluate ox (2,0)\fQUESTION 8 xy - xy 3 if (x , y) # (0,0) f ( x, y) = x 2+ y2 0 if (x , y) = (0,0) a2f evaluate ayox (0,0) QUESTION 9 x y- xy3 if (x , y) # (0,0) f ( x, y) = x 2 + y 2 0 if (x, y) = (0,0) a2 f evaluate axay ( 0, 0) QUESTION 10 If x2+y2+z2=3xyz oz evaluate ax (1, 1, 1)