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14 May, 06:02

If 12^-x=5, what does 12^2x equal

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  1. 14 May, 09:50
    0
    0.04

    Step-by-step explanation:

    12^ (-x) = 5 (taking log on both sides)

    log [ 12^ (-x) ] = log 5

    -x log 12 = log 5

    -x = log 5 / log 12

    x = - (log 5/log12)

    x = - 0.6477

    12^ (2x)

    = 12^[2 (-0.6477) ]

    = 12 ^ (-1.295)

    = 0.04
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