Explain why {{MATH_138}}. {{CMD_139}} Although {{MATH_140}} may appear to simplify to just {{MATH_141}}, let's see what happens when we plug in some values. {{MATH_142}} Let {{MATH_143}}. We see that for any negative {{MATH_144}}, {{MATH_145}}, and, therefore, {{MATH_146}}. Hence {{MATH_147}}. Rather we see that {{MATH_148}}. The domain of {{MATH_149}} is {{MATH_150}} and the range is {{MATH_151}}. For your viewing pleasure we've included a graph of {{MATH_152}}: {{CMD_153}} {{ENV_154}} {{CMD_155}} {{CMD_156}} {{CMD_157}}