Please answer 3 questions

graph Va, showing dy and ay in the picture. + 54 1 - 10x 39-42 Find formulas for dy and Ay. at Xo = 0 39. y = x' 40 y = 8x - 4 and com- 41. y = x2 - 2x + 1 42. y = sin x d directly 43-46 Find the differential dy. 440 ? 43. (a) y = 4x3 - 7x2 mation to (b) y = xcos x g device. 44. (a) y = 1/x (b) y = 5 tanx xo = 0 to 45 (a) y = xv1 -x (b) y = (1 +x)-17 mation to _ 1-x3 g device. 46. (a) y = x3 - 1 ( b ) y = 2 - x 161 0 ? mation to 47-50 True-False Determine whether the statement is true or falce Explain your