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кирилл1346
@кирилл1346
July 2021
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даю 20 баллов помогите с решением написать уравнения
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Удачник66
Verified answer
1) 0,3^x = 0,3
x = 1
2) 0,7^x = (10/7)^3 = (7/10)^(-3)
x = -3
3) 0,4^(4-5x) = (0,4)^(2,5)
4 - 5x = 2,5
5x = 4 - 2,5 = 1,5
x = 0,3
4) (1/6)^(4x-7) = 6^(x-3) = (1/6)^(3-x)
4x - 7 = 3 - x
5x = 10
x = 2
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Answers & Comments
Verified answer
1) 0,3^x = 0,3x = 1
2) 0,7^x = (10/7)^3 = (7/10)^(-3)
x = -3
3) 0,4^(4-5x) = (0,4)^(2,5)
4 - 5x = 2,5
5x = 4 - 2,5 = 1,5
x = 0,3
4) (1/6)^(4x-7) = 6^(x-3) = (1/6)^(3-x)
4x - 7 = 3 - x
5x = 10
x = 2