आबादारिफोरनि आबाद मावनायनि थांखिया मुलामफा आरजिनायलʼ नङा अदेबानि गोबां मुलामफा आरजिनायबो ।
This area of production-function is called irrational area , because in this area on doing production , on increasing the amount of production equipment , the amount of obtained profit also keeps increasing .