urgeeeennttttt, dau coroana

Răspuns:
a) (7/5)¹⁰:(7/5)⁹-2/5=7/5-2/5=5/5
b)5/9+(2/3)¹⁰:(2/3)⁸=5/9+(2/3)²=5/9+4/9=9/9