2 log 2 (x +1) - 4 2log (x+1) + 3 =0
Matematika
renisurahapriani
Pertanyaan
2 log 2 (x +1) - 4 2log (x+1) + 3 =0
1 Jawaban
-
1. Jawaban virgeenanuvi
²log² (x +1) - 4 ²log (x + 1) + 3 = 0
misal ²log (x + 1) = a
a² - 4a + 3 = 0
(a - 1)(a - 3) = 0
a = 1 atau a = 3
²log (x + 1) = 1
²log (x + 1) = ²log 2
x + 1 = 2
x = 1
²log (x + 1) = 3
²log (x + 1) = ²log 8
x + 1 = 8
x = 7
Jadi, x = 1 atau x = 7