Question

Nilai x yang memenuhi persamaan
5log (x^2-1) - 5log (x+1) = 1.
please bantu jawab ya

Answer 1

→ Logaritma ←
≡ Penyelesaian:
⇒ ⁵ ㏒ (x² - 1) - ⁵ ㏒ (x + 1) = 1
⇒ ⁵ ㏒ [(x² - 1) / (x + 1)] = 1
⇒ ⁵ ㏒ [(x + 1)(x - 1) / (x + 1)] = 1
⇒ ⁵ ㏒ x - 1 = 1
⇒ x - 1 = 0
⇒ x = 1