Предмет: Алгебра, автор: blakccat95

найдите значение выражения

Приложения:

ghj30110: извини. у тебя после а стоит больше или равно?

blakccat95: равно

blakccat95: спасибо

evvoronina1: Возможно, Вы не знаете, но после а у меня стоит значок ^, которым здесь на ЗНАНИЯ.com обозначают возведение в степень, если нет возможности написать маленькой цифрой показатель степени.
а^2 - а в квадрате
а^3 - а в кубе
а^4 - а в четвертой степени.

blakccat95: да я знала об этом давно, спасибо за объяснение)))

Ответы

Автор ответа: evvoronina1

(1/(9а) + 1/(5а)) • (а^2)/8 =
= (5/(45а) + 9/(45а)) • (а^2)/8 =
= 14/(45а)• (а^2)/8 =
= 7/45 • а/4 =
при а = -9
= 7/45• (-9)/4 =
= -7/5 • 1/4 = -7/20

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