Предмет: Математика, автор: Vasa0009

5^x+1-5^x+2=-20 помогите плиз очень нужно


Vasa0009: 5^(x+1)-5^(x+2)= 20
Vasa0009: Поможешь пожалуйста ))
Vasa0009: спасииибооо)))
Vasa0009: То есть -20 ?
Vasa0009: Я очень волнуюсь экзамен и мелочи не замечаю извнени ее меня )
Vasa0009: Вы супер )))

Ответы

Автор ответа: wangross
0
5^{x+1}-5^{x+2}=-20 \\ 5^x*5-5^x*5^2=-20 \\ 5*5^x-25*5^x=-20 \\ 5^x(5-25)=-20 \\ -20*5^x=-20 \\ 5^x=1 \\ 5^x=5^0 \\ x=0


Ответ: 0
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