Купила "Я решу ЕГЭ" математику - теперь мучаюсь.
Найдите корень уравнения
1) 13^(11-x)=7^(11-x)
2) 11^(13-x)=5^(x-13)
3) 2^(7-x)=100*5^(x-7)
4) 2^x*3^x=36^(x-4)
5)[tex] log_{3} (7-x)=log_{1-x} +1 [/tex]
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