Question

Найдите зна­че­ние вы­ра­же­ния при

Answer 1

Решение во вложении:

Answer 2

(1/9a+1/3a)*a²/8=(1/(9*9)+1/(3*9))*(9²/8)=(1/81+1/27)*(81/8)=(4/81)*81/8=1/2.