What is the value of log [base 10 (1 / 70)] if log [base 10 (7)] = a?

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Ram Mohan Arumilli

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Log of 1/70 to the base 10 = -1 = -1 = -1 =-1 [ 1 + a }, ( since it is given that log 7 to base 10 = 'a' ,and we know that log 10 to base 10 =1 ) Therefore, log ( 1/70 ) to base 10 = -(1+a).
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log =log =-log =-+log ] = -.
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