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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]
