Предмет: Алгебра, автор: Raymond2223

Решить неравенство 10×3^x+8×3^-x>9 помогите пожалуйста срочно нужно жду. ...

Ответы

Автор ответа: sedinalana

3^x=a
10a+8/a-9>0
10a²-9a+8>0
D=81-320=-239<0
нет решения

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