Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Donat el sistema d'inequacions: [open table row cell # p less than 0 end cell row cell # q less than 0 end cell end table close curly brackets] indica quina de les següents és l'expressió, en forma d'interval, de la solució del sistema : [open parentheses negative infinity comma negative # a close parentheses union open parentheses # a comma plus infinity close parentheses]; [left parenthesis negative infinity comma negative # b right parenthesis union left parenthesis # b comma plus infinity right parenthesis]; [left square bracket negative # a comma negative # b right square bracket union left square bracket # b comma # a right square bracket]; [open parentheses negative # a comma negative # b close parentheses union open parentheses # b comma # a close parentheses]
Right answer summary: [open parentheses negative # a comma negative # b close parentheses union open parentheses # b comma # a close parentheses]
Question state: todo