In Problems 59-64, use the Intermediate Value Theorem to determine which of the functions must have zeros in the given interval. Indicate
those for which the theorem gives no information. Do not attempt to
locate the zeros.
59. f(x)=x - 3x on (-2, 2)
60. f(x)=x+- 1 on (-2, 2]
61. f(x)= - I on [10,20] [10, 20]
(x + 1)2
62. f(x)=r? - 2r? -r+2 on [3, 4]