Предмет: Математика, автор: Ashot2000sarg1

Решить уравнения срочноооо

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Автор ответа: kirichekov

(1/64)^x=√(1/8)
(1/8)^(2x)=(1/8)^(1/2)
2x=1/2, x=1/4
7^(2x)-6*7^x+5=0
7^x=t, t>0
t²-6t+5=0
t₁=1, t₂=5
обратная замена:
7^x=1, 7^x=7^0, x₁=1
7^x=5, log₇(7^x)=log₇5, x*log₇7=log₇5
x₂=log₇5

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