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Mathematics

If log10 2 = a and log10 3 = b; express log 2.25 in terms of 'a' and 'b'.

Logarithms

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Answer

Given,

log102 = a and log103 = b

Simplifying the expression :

⇒ log 2.25

⇒ log 225100\dfrac{225}{100}

⇒ log 94\dfrac{9}{4}

⇒ log 9 - log 4

⇒ log 32 - log 22

⇒ 2 log 3 - 2 log 2

⇒ 2b - 2a.

Hence, log 2.25 = 2b - 2a.

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