37-50. Horizontal asymptotes Determine lim f(x) and lim f(x) 818 x11* for the following functions. Then give the horizontal asymptotes of f (if any). 3x-7 4x 37. f(x) = 38. f(x)= = 20x+1 x2 + 5x 6x2 - 9x+8 12x8 - 3 39. f(x) = 40. f(x) = = 3x + 2 3x8 - 2x7 3x3-7 41. f(x) = 42. f(x) = x4 + 5x2 2x + 1 3x4-2 40x + x2 6x2 +1 43. f(x) = 44. f(x) = 16x4- 2x 4x4 + 3x + 1 1 x + 1 45. f(x) = = 46. f(x) = 47. f(x) = 49. f(x) = 2x44x8-9x4 4x +1 2x3 + 16x6 +1 6 x +8 4x + 3x+1 48. f(x) = x - x - 9x 50. f(x) = 4x(3x - 9x + 1) == 2x + 1