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Evaluate the following: log_(sqrt(3)) 27 - Mathematics

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Question

Evaluate the following:

`log_(sqrt(3)) 27`

Evaluate
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Solution

Given: `log_(sqrt(3)) 27`

Step-wise calculation:

Write both base and argument as powers of 3:

`sqrt(3) = 3^(1/2)` and 27 = 33.

Therefore `log_(sqrt(3))27 = log_(3^(1/2))(3^3)`.

Use the identity

`log_(a^r)(a^s) = s/r`

To get `log_(3^(1/2))(3^3) = 3 ÷ (1/2)`

`log_(3^(1/2))(3^3) = 6`

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Chapter 7: Logarithms - Exercise 7A [Page 140]

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Nootan Mathematics [English] Class 9 ICSE
Chapter 7 Logarithms
Exercise 7A | Q 3. (ii) | Page 140
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