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HalLigen228
@HalLigen228
August 2022
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уравнение с логарифмом
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Veteran2016
1) 7^(x+1) - 5*7^x = 98
7*7^x - 5*7^x = 98
2*7^x=98
7^x=49
x=2
2) 9^x + 3 = 4*3^x
3^x=t
t^2 - 4t + 3 = 0
t1=1; x1=0;
t2=3; x2=1.
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Answers & Comments
7*7^x - 5*7^x = 98
2*7^x=98
7^x=49
x=2
2) 9^x + 3 = 4*3^x
3^x=t
t^2 - 4t + 3 = 0
t1=1; x1=0;
t2=3; x2=1.