Phi of 0 is phi of 0 plus 0, right, phi of 0 is phi of 0 plus 0 because 0 is equal to 0 plus 0. Phi of 0 plus 0 is phi of 0 plus phi of 0. So, phi of 0 is equal to phi of 0 plus phi of 0. But now what integer has this property?
= , ఎందుకంటే 0 = 0 + 0 కి సమానం. = + ఇది + . కానీ ఇప్పుడు ఏ ఇంటిజర్ ఈ లక్షణాన్ని కలిగి ఉంది?