Logarithms Practice Test 2

Question : 11 of 39

Marks: +1, -0

7 \log (16/15) + 5 \log (25/24)

+ 3 \log (81/80) = ?

Solution:

7 \log (16/15) + 5 \log (25/24)

+ 3 \log (81/80)

=7(4\log 2-\log3-\log5)

+5(2\log5-\log3-3\log2)

+3(4\log3-4\log2-\log5)

=\log 2

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