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Solve: 8\(^{x - 2}\) = 4\(^{3x}\)  

Further Mathematics
WAEC 2019

Solve: 8\(^{x - 2}\) = 4\(^{3x}\)

 

  • A. -2
  • B. -1
  • C. 1
  • D. 2
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Correct Answer: Option A
Explanation

8\(^{x - 2}\) = 4\(^{3x}\)

2\(^{3(x - 2)}\) = 2\(^{2(3x)}\)

2 \(^{3x - 6}\) = 2\(^{6x}\)

 3x - 6  = 6x

3x - 6x = 6

-3x = 6

x = -\(\frac{6}{3}\)

x = -2


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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