Question 198256
sol:
i.8 can be written as 18/10
now log 1.8=log (18/10)
log (18/10)=log (2*9/2*5)
           =log(9/5)
          =log (a/b)=loga-logb
log(9/5)=log 9-log 5
        =log(3*3)-log 5
        =log(3^2)-log 5
        =2log3-log5  (i.e;log m^n=n logm)
log 1.8=2 log3-log 5