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Express P in terms of others: log P + log T = 2 log 10 + log I – log R

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Question

Express P in terms of others:

log P + log T = 2 log 10 + log I – log R

Sum
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Solution

We are given:

log P + log T = 2 log 10 + log I – log R

Step 1: Combine logs on both sides

Left side:

log(PT)

Right side:

2 log 10 = log 102 = log 100

log 100 + log I = log(100I)

`log(100I) - log R = log ((100I)/R)`

Now the equation becomes:

`log(PT) = log((100I)/R)`

Step 2: Equate arguments

`PT = (100I)/R`

⇒ `P = (100I)/(RT)`

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Chapter 7: Logarithms - EXERCISE 7B [Page 75]

APPEARS IN

B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 7 Logarithms
EXERCISE 7B | Q 4. (ii) | Page 75
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