Question

Log7 base 10 = a, find log 1/70 base 10

Answer 1

Hi thanks for the question!

$log_{10}(7) = a$

$log_{10}( \frac{1}{70} ) \\ = log_{10}(1) - log_{10}(70) \\ = - log_{10}(70) \\ = - ( log_{10}(10) + log_{10}(7) ) \\ = - (1 + a)$

Hope helped!

Answer 2

Log 7 base 10=a. log 7^-1 base 10 = -log 7 base 10.=-a log 1/7 base 10 = -a. log 1/7×10 base 10= log 1/7 base 10 + log 1/10 base 10 =-a -1 Ans