If 4^(x + 1) = 8^(x − 1), what is the value of x?
Correct answer D. 5
Explanation
Write both sides as powers of 2: 2^(2x + 2) = 2^(3x − 3). So 2x + 2 = 3x − 3, giving x = 5.
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Correct answer D. 1000
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Correct answer B. 125
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Correct answer B. 13
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Correct answer A. 4
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