For each of the three pairs of functions, describe {{MATH_173}} when {{MATH_174}} is positive, and when {{MATH_175}} is negative.{{CMD_176}} {{CMD_177}} When {{MATH_178}} is positive, {{MATH_179}} is {{CMD_180}}{{CMD_181}}positive{{CMD_182}}{{CMD_183}}increasing{{CMD_184}}{{CMD_185}}negative{{CMD_186}}{{CMD_187}}decreasing{{CMD_188}}{{CMD_189}}. When {{MATH_190}} is negative, {{MATH_191}} is {{CMD_192}}{{CMD_193}}positive{{CMD_194}}{{CMD_195}}increasing{{CMD_196}}{{CMD_197}}negative{{CMD_198}}{{CMD_199}}decreasing{{CMD_200}}{{CMD_201}} {{CMD_202}} {{CMD_203}}