Ask Question
9 November, 02:01

Which of the following shows the extraneous solution to the logarithmic equation below? log3 (18x^3) - log3 (2x) = log3 (144). A. x=-16 B. x=-8 C. x=-4 D. x=-2

+2
Answers (1)
  1. 9 November, 02:33
    0
    Log3 (18x^3) - log3 (2x) = log3 (144)

    log3 (18x^3/2x) = log3 (144)

    9x^2 = 144

    x^2 = 144/9 = 16

    x = 4 or x = - 4

    x = - 4 is the extraneous solution.
Know the Answer?