penyelesaian 7log(x+1)+7log(x-5)=1adalah

⁷log(x+1) + ⁷log(x-5) = 1
⁷log(x+1)(x-5) = ⁷log7

(x+1)(x-5) = 7
x² + x - 5x - 5 = 7
x² - 4x - 5 - 7 = 0
x² - 4x - 12 = 0
(x + 2)(x - 6) = 0

x + 2 = 0
x = -2 (tidak memenuhi)

x - 6 = 0
x = 6

maka HP = {6}