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10-02-2021
Mathematics

contestada

9^x + 9^x-1 = 30 what's the value of x

Respuesta :

10-02-2021

small (x)
9(x) + 9(x) - 1 = 30
2 x 9(x) - 1 = 30
2 x 9(x) = 30 + 1
2 x 9(x) = 30
simplify
9x = 31/2
x = 1/2 x log (3) (31/2)
or
x ≈ 1.24741

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