3. Selesaikan setiap persamaan logaritma berikut dana tuliskan bentuk x dalam variabel lain.
b. y = a / (1 + be-kx)
Jawaban :
y = a / (1 + be-kx)
(1 + be-kx) = a / y
be-kx = a/y - 1
be-kx = (a - y)/y
e-kx = (a - y)/by
- kx = elog ((a - y)/by)
x = - 1/k elog ((a - y)/by)
x = - k-1 . elog ((a - y)/by)
x = elog ((a - y)/by)-k^-1
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