{"result":{"text":"table attributes columnalign left end attributes row cell f left parenthesis x right parenthesis equals open vertical bar x minus 1 close vertical bar plus open vertical bar x minus 2 close vertical bar plus open vertical bar x minus 3 close vertical bar comma space 2 less than x less than 3 end cell row cell S i n c e space space 2 less than x less than 3 end cell row cell therefore open vertical bar x minus 1 close vertical bar equals x minus 1 comma space open vertical bar x minus 2 close vertical bar equals x minus 2 comma space open vertical bar x minus 3 close vertical bar equals negative left parenthesis x minus 3 right parenthesis end cell row cell therefore f left parenthesis x right parenthesis equals x minus 1 plus x minus 2 minus x plus 3 equals x end cell row cell f left parenthesis x right parenthesis equals x space i s space a n space i d e n t i t y space f u n c t i o n. space therefore space f space i s space a space b i j e c t i o n. end cell end table"},"status":"ok"}