please expand it please
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Answer:
log 343/125 = log(7×7×7) - log(5×5×5)
=log 7+ log 7+ log 7 - log 5 - log 5 - log 5
= 0.84+0.84+0.84 - 0.69- 0.69 - 0.69
=2.52-2.07
=0.45