Pregunta: 153 Partial Derivatives For f(x,y) = 2x2 - 3y - 4, find fx A) 4x – 3 B) 4x – 4 C) 4x D) x2 – 3 2. For f(x,y) = (xy – 1), find fx A) 2(xy - 1)y B) 2(xy - 1) C) (y - 1)2 D) y(xy - 1)2 3. For f(x, y) = 7x2 + y2 , find fy A) veziy B) /2x + y2 C) 2x/x2 + y2 D) 4. For f(x,y) = e2x+3y+1 , find fy x2 + y2 A) 3e2x+3y+1 B) (2x + 1)e ex+3y+1 C) e2+3y+1 D) 3ye2x+3y+1 5.

153 Partial Derivatives For f(x,y) = 2x2 - 3y - 4, find fx A) 4x – 3 B) 4x – 4 C) 4x D) x2 – 3 2. For f(x,y) = (xy – 1), find fx A) 2(xy - 1)y B) 2(xy - 1) C) (y - 1)2 D) y(xy - 1)2 3. For f(x, y) = 7x2 + y2 , find fy A) veziy B) /2x + y2 C) 2x/x2 + y2 D) 4. For f(x,y) = e2x+3y+1 , find fy x2 + y2 A) 3e2x+3y+1 B) (2x + 1)e ex+3y+1 C) e2+3y+1 D) 3ye2x+3y+1 5. For f(x, y) = xy, find fx and fy A) fx = (In x)xY; fy = yxy-1 B) fx = yx9-1; fy = (In x)x® C) fx = (In y)xy ; fy = x29-2 D) fx = (x - 1)"; fy = xy-1 6. For f(x,y) = x²y + cos y + y sin x find fxx, fyy, fxy, and fyx. A) fxx = 2x - x sin x; fyy = - cos x ; fxy = fyx = 2y + cos x B) fxx = 2y – y sin x; fyy = -cosy ; fxy = fyx = 2x + cos x C) fxx = 3y – sin x; fyy = - siny ; fxy = fyx = 3y + cosy D) fxx = 2y – x sin x; fyy = - cos x ; fxy = fyx = 2x + sin x