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Question

7log(1615)+5log(2524)+3log(8180) is equal to

A
1
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B
log 2
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C
log 3
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Solution

The correct option is B log 2
Given expression
=7log[243×5]+5log[523×23]+3log[345×24]
=7[4log2log3log5]+5[2log5log33log2]+3[4log3log54log2]
=log2

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