Question

Пусть 2a-a/1=2/3 . Найти (a^2+1)/a^3

Answer 1

2a-a/1=2/3
а/1=2/3
а=2/3
(a^2+1)/a^3=((2/3)^2+1)/(2/3)^3=13/9*27/8= 39/8=4,875

Answer 2

ясно