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If log 9 = 0.9542, find the value of log 27. - Mathematics

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Question

If log 9 = 0.9542, find the value of log 27.

Sum
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Solution

log 9 = 0.9542

We need to find the value of log 27.

Step 1: Express 27 in terms of 9:

We know:

`27 = 9^(3/2)`

Thus, we can express log 27 as:

`log 27 = log(9^(3/2))`

Step 2: Apply the logarithmic power rule:

Using the property log ab = b log a, we get:

`log 27 = 3/2 log 9`

Step 3: Substitute the given value of log 9:

We are given log 9 = 0.9542, so:

`log 27 = 3/2 xx 0.9542`

log 27 = 1.4313

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Chapter 7: Logarithms - MISCELLANEOUS EXERCISE [Page 77]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 7 Logarithms
MISCELLANEOUS EXERCISE | Q 11. (ii) | Page 77
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