45. find the repeated limit: y lim lim x0y0 x+y (a) 0 (b) co (c) 1 (d) does not exist 46. let sa, y)=x +2y when (x,y) (1,2) 0 when (x,y) = (1,2) then the functi

45. Find the repeated limit: y lim lim x0y0 x+y (A) 0 (B) co (C) 1 (D) Does not exist 46. Let Sa, y)=x +2y when (x,y) (1,2) 0 when (x,y) = (1,2) Then the function fis.. at (1, 2). (A) continuous (B) not continuous (C) differentiable (D) None of these 47 Find(3x+1) d (A) 11 (B) 11/4 (C) 11/3 (D) 11/2 48. If lim( (a,b) J (X, V) =l and lim, x.y) -- (a,b) 8(X, V) = m then lim (Sxy)+g(x, Y) = . (x,y)(a, b) (A) 1+m (B) 1-m (C) Im (D) None of these 49. Given that f(x, y) = x'y. Find fy (A) 2xy (B) (C) 3x (D) None of these XE[H-3)-MAT(5) (12)