Question on: JAMB Mathematics - 1990

Simplify 3 log69 + log612 + log664 - log672

A
5
B
7776
C
log631
D
(7776)6
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Correct Option: A

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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