phanvantrung070903 phanvantrung070903
  • 15-06-2021
  • Mathematics
contestada

Tích các nghiệm của phương trình Log(x-1)²=2 là

Respuesta :

thuydunglyn
thuydunglyn thuydunglyn
  • 15-06-2021

Answer:

-99

Step-by-step explanation:

Log(x-1)²=2

Log(x-1)²=Log(100)

(x-1)²=100

x-1=10 and x-1=-10

x₁=11     and x₂=-9

x₁ × x₂ = 11 × (-9) = -99

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