Since the domain of {{MATH_30}} is a closed interval {{MATH_31}}, we have to evaluate the function {{MATH_32}} at the end points and at the critical point: {{MATH_33}} {{MATH_34}} {{MATH_35}} So, the maximum is attained at the critical point. {{CMD_36}} {{CMD_37}} {{ENV_38}} {{CMD_39}} {{CMD_40}} {{CMD_41}}