When you evaluate {{MATH_49}} at {{MATH_50}}-values approaching (but not equal to) {{MATH_51}}, what happens to the value of {{MATH_52}}? {{CMD_53}} The value of {{MATH_54}} approaches {{MATH_55}}. {{CMD_56}} {{CMD_57}} Just from checking some values, can you be absolutely certain that your answer to the previous problem is correct? {{CMD_58}} {{CMD_59}} {{CMD_60}}yes{{CMD_61}} {{CMD_62}}no{{CMD_63}} {{CMD_64}} {{CMD_65}} {{CMD_66}} Here you only have information about a few specific points on the graph. There are infinitely many {{MATH_67}}-values close to, but not equal to, {{MATH_68}}. Hence we cannot be completely certain. {{CMD_69}} {{CMD_70}} {{CMD_71}}