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प्रश्न
Evaluate the following without using tables :
log 5 + log 8 - 2 log 2
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उत्तर
Consider the given expression
log 5 + log 8 - 2 log 2 .....[ nlogam = logamn ]
= log 5 + log 8 x 8 - log 22 ......[ nlogam = logamn ]
= log 5 x 8 - log 22
= log 40 - log 4
= log`40/4` .....[ logam - logan = loga`(m/n)`]
= log 10
= 1
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