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Questions  

log7 log7 7(77)=

a
3 log27
b
1-3 log37
c
1-3 log72
d
None of these

detailed solution

Correct option is C

log7 log7 777=log7 log7 77/8=log7(7/8)=log7 7-log7 8=1-log7 23=1-3 log7 2.

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