Friday, October 22, 2021

Kunci Jawaban Matematika Sukino Kelas X Peminatan Bab 2 LKS 3 Bagian B no 2b

 2. Selesaikan


b. 

3log (2x + 1) - 3log (x - 7) = 2

3log ((2x + 1) / (x - 7)) = 3log 32

(2x + 1) / (x - 7) = 32

(2x + 1) / (x - 7) = 9

2x + 1 = 9 (x - 7)

2x + 1 = 9x - 63

2x - 9x = - 63 - 1

- 7x = - 64

x = 64/7

x = 9 1/7

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