Предмет: Математика, автор: alesya9999

log ^(2) (x) по основанию 3 меньше или равно 9

Ответы

Автор ответа: sedinalana

log²(3)x-9≤0
(log(3)x-3)(log(3)x+3)≤0
log(3)x=3⇒x=27
log(3)x=-3⇒x=1/27
x∈[1/27;27]

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