Solve the equation log 8 x - 4log 8 x = 2
MATHEMATICS
WAEC 1994
Solve the equation log8x - 4log8x = 2
- A.1/4
- B.1/2
- C. 1
- D. 2
Correct Answer: A.1/4
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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