Question

Помогите решить 1 и 3 пример

Answer 1

(4/9-3 1/15).9=(4/9 - 46/15).9=4/9 .9 -46/15 .9=4-46/5 .3=
=4-9,2.3=4-27,6=-23,6

64.4ˇn=4³.4ˇn=4ˇ(n+3)