Answer :

Let log3 7 = log107× log310


(since, logaM = logbM × logab)





Then


Taking log on both side



log x = log 0.8450 – log 0.4771


( log a÷ b = loga – log b)


log x = –0.0731– (–0.3213)


= – 0.0731 + 0.3213


= 0.2482


x = antilog 0.2482 = 1.771


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