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Автор - sergeevanastua

9 степени х -8-3в степени х-7=0

Ответ

Автор - nKrynka
Решение
9^(x - 8) - 3^(x - 7) = 0
9^(x - 8) = 3^(x - 7) 
3^(2x - 16) = 3^(x - 7) 
2x - 16 = x - 7
2x - x = - 7 + 16
x = 9

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