Предмет: Алгебра, автор: mimirishka

Докажите, что аb-cd<0 при всех значениях х, если а=х в 6 степени-6, b=х в 12 степени+6х в 6 степени+36, с=х в 9 степени+9, d=x в 9 степени-9

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Автор ответа: Софьенька

1/2x(2x-4)>=(x-2)x

x*x-2x>=x*x-2x

x*x-2x-x*x+2x>=9

9=9

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