LOGARITHMS F5

 Evaluate Log60 – Log0.42 + Log700.

 

Solution

 

= Log60 – Log0.42 + Log700.

 

= Log(60 x 700)

               0.42

 

= Log(42000)

             0.42

 

= Log(4200000)

              42

 

 

= Log 100,000

             

 

= Log₁₀100,000

 

= Log₁₀10⁵

            

= 5Log₁₀10

 

= 5 x 1

 

= 5

 

∴ Log60 – Log0.03 + Log50 = 4

 

TRY THIS……………………….

 

Evaluate Log60 – Log1.2 + Log2000