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14 June, 16:41

What is the exact value of x in the exponential equation 2^8x - 3 = 7?

x = log4/8log2

x = 1/8log2

x = 5/8

x = log5/8

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Answers (1)
  1. 14 June, 16:42
    0
    Hello,

    2^ (8x) - 3=7

    ==>2^ (8x) = 10

    ==>8x log (2) = log (10)

    ==>8x log (2) = 1

    ==>x=1 / (8*log (2))

    With parenthesis on the denominator, the answer is B.
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