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Express both bases as powers of the same prime number.

Mathematics

ScanSolve AI Answer

Answer

x=−3x = -3

Step-by-step solution

5 steps

Here is the solution to the indices problem:

2. Find the value of xx which satisfies the equation: 16x=8x−116^x = 8^{x-1}

  1. Express both bases as powers of the same prime number.

    16=2416 = 2^4 8=238 = 2^3
  2. Substitute these into the equation.

    (24)x=(23)x−1(2^4)^x = (2^3)^{x-1}
  3. Apply the power rule (am)n=amn(a^m)^n = a^{mn}.

    24x=23(x−1)2^{4x} = 2^{3(x-1)} 24x=23x−32^{4x} = 2^{3x-3}
  4. Equate the exponents since the bases are the same.

    4x=3x−34x = 3x - 3
  5. Solve for xx.

    4x−3x=−34x - 3x = -3 x=−3x = -3

    The value of xx is x=−3\boxed{x = -3}.

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