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24 November, 01:03

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

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  1. 24 November, 04:31
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    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.
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