Question

can anyone solve this logarithm question 4b

Answer 1

We know , loga+logb = log(ab)
log10(20) + log10(5) = log10(20×5)
= log10(10²) = 2

Answer 2

Given log 20 base 10 + log 5 base 10

         = log base 10(5 * 20)

         = log base 10(100)

         = log base 10(10^2)

        = 2 log base 10(10)

        = 2 * 1

       = 2.


Hope this helps!