tentukan nilai HP dari log(x-1)+log(x-3)=log(x-1)

Log((x-1)(x-3)) = log(x-1)
Log(x²-4x+3) = log(x-1)
x²-4x+3 = x-1
x²-5x+4 = 0
(x-4)(x-1)
x=4 V x=1

HP ={1,4}