Please solve 47, 51, 53 HELP!

43. f(x) = x2 44. 8(x) = + 2 X O 45. h(t) = t - 1 46. k(u) = Vu 47. k(x) = x+Vx-1 48. h(x) = V(x+ 1) Vx - 1 ind the 49. g(u) = u 50. h(x) x2 - 1 51. g(y) = [-y] 52. f (t ) = V -t 53. g(u) = u2 + 1 54. f(t) = V4 -12 12 - 1 - 6 55. f(x) = - V9 - (x - 9)2 56. f(x) = V-x+2 x + 1