Because the value of {{MATH_67}} is {{CMD_68}}{{CMD_69}}positive{{CMD_70}}{{CMD_71}}negative{{CMD_72}}{{CMD_73}}zero{{CMD_74}}{{CMD_75}}, the function {{MATH_76}} has{{CMD_77}}{{CMD_78}}a local maximum{{CMD_79}}{{CMD_80}}a local minimum{{CMD_81}}{{CMD_82}}neither a local maximum nor a local minimum{{CMD_83}}{{CMD_84}}possibly a local maximum, a local minimum or neither{{CMD_85}}{{CMD_86}} at {{MATH_87}} by the second derivative test.{{CMD_88}}