On {{MATH_360}}, {{MATH_361}} has one zero, namely {{MATH_362}}. The sign of {{MATH_363}} changes from {{CMD_364}}{{CMD_365}}positive to negative{{CMD_366}} {{CMD_367}}negative to positive{{CMD_368}}]{{CMD_369}} at this point. On {{MATH_370}}, {{MATH_371}} has one zero, namely {{MATH_372}}. The sign of {{MATH_373}} changes from {{CMD_374}}{{CMD_375}}positive to negative{{CMD_376}} {{CMD_377}}negative to positive{{CMD_378}}]{{CMD_379}} through this point.