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Prove that Log 10 125 = 3 (1 - Log 10 2)Prove that Log 10 125 = 3 (1 - Log 10 2) - Mathematics

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Question

Prove that log 10 125 = 3 (1 - log 10 2)

Sum
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Solution

L.H.S.
= log 10 125
= `"log"_10 (1000/8)`
= log 10 1000 - log 10 8
= log 10 (10)3 - log10(2)3
= 3log 10 10 - 3log 10 2
= 3 x 1 - 3log10 2
= 3(1 - log 10 2)
= R.H.S.

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More About Logarithm
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Chapter 10: Logarithms - Exercise 10.2

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Frank Mathematics [English] Class 9 ICSE
Chapter 10 Logarithms
Exercise 10.2 | Q 39
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