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प्रश्न
If log 27 = 1.431, find the value of : log 9
उत्तर
log 27 = 1.431
⇒ log 3 x 3 x 3 = 1.431
⇒ log 33 = 1.431
⇒ 3log3 = 1.431
⇒ log 3 = `1.431/3`
⇒ log 3 = 0.477 ...(1)
log 9
= log( 3 x 3 )
= log 32
= 2 log 3
= 2 x 0.477 ...[ from(1) ]
= 0.954
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