Find y'. 49. y 2 x 2 4 2, dy find 53. If y = X dx x=-2 1 dy 57. If y = find 3x4' dx x=-1 61. Find an equation of the tangent line to the graph of = 1 f(x) x a) at (1, 1); b) at (3, ); c) at (-2, 1).