Check the graph of {{MATH_12}} to find such interval. {{CMD_13}} {{MATH_14}} achieves its maximum at {{MATH_15}}. {{CMD_16}} Recall: The function {{MATH_17}} is the derivative of {{MATH_18}}!{{CMD_19}} Check the graph of {{MATH_20}}!{{CMD_21}} There are two critical points, since {{MATH_22}} and {{MATH_23}}. {{CMD_24}}