Question

Dwara if log10 7 is equals to 8 then log 10 in the bracket 1 / 70 is equal to

Answer 1

given log base 10 (7) = 8

thus log base 10 (1/70) = -log base 10 (70)

= -(log base 10(7) +log base 10(10))
= -(8+1) = -9