Find all points of discontinuity of f, where f is defined by`f(x)={x/(|x|), ifx<0 1, ifxgeq0`

Find all points of discontinuity of f,where fis defined by xf(x)={(x)/(|x|), if x =0

Find all points of discontinuity of f, where f is defined by f(x)={{:(|x|+3, ifxlt=-3),(-2x , if -3 < x <3),( 6x+2,ifxgeq3):}

Find all points of discontinuity of f, where f is defined by f(x)={{:((x)/(|x|)," if "x lt0),(-1," if "x ge 0):}

Find all points of discontinuity of f, where f is defined by f(x)={{:((x)/(|x|)," if "x lt0),(-1," if "x ge 0):}

Find all points of discontinuity of f, where f is defined by: f(x)={(x/|x|,,,,if x < 0),(-1,,,,if xge0):}

Find all points of discontinuity of f, where f is defined by f(x)={{:(|x|+3," if "x le -3),(-2x," if "-3 ltx lt 3),(6x+2," if "x ge 3):} .