Simplify 3 log69 + log612 + log664 – log672

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Mathematics JAMB 1990

Simplify 3 log69 + log612 + log664 – log672

  • 5 checkmark
  • 7776
  • log631
  • (7776)6

The correct answer is: A

Explanation

3 log69 + log612 + log664 - log672

= log693 + log612 + log664 - log672

log6729 + log612 + log664 - log672

log6(729 x 12 x 64) = log6776

= log665 = 5 log66 = 5

N.B: log66 = 1
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