Solve the equation log8x – 4log8x = 2

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Mathematics WAEC 1994

Solve the equation log8x – 4log8x = 2

  • 1/4 checkmark
  • 1/2
  • 1
  • 2
  • 4

The correct answer is: A

Explanation

log8x - 4log8x = 2; log8x - log8x4 = 2
log8x/x4 = 2
x/x4 = 82 = 1/x3 = 64
x3 = (1/4)3; x = 1/4
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