Предмет: Математика, автор: Itishnik

Пожалуйста помогите решить 36*3^x-9^x=243

Ответы

Автор ответа: Lesben

1

36×3ˇx-9ˇx = 243

3ˇx=t

36t-t²=243

t²-36t+243=0

D=1296-972=324,√D=18

a)t1=(36+18)2=54/2=27, 3ˇx=27, 3ˇx=3ˇ3, x=3

b)t2=(36-18)/2=18/2=9, 3ˇx=9. 3ˇx=3ˇ2, x=2

Автор ответа: kirilltarasenko1

1

Вот решение твоего примера

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