Question 592716
Condense the expression
Ln 20+2ln 1/2 - ln x

  first, we have to remember that exponential logarithm turns a division into a subtraction and  a product into an addition and an exponent into a product, and vice-verca.

  with that in mind,  we have ,

  ln 20  +  2ln1/2  -  ln x  =   ln 20 - ln x  +  ln(1/2)^2
                             =  ln 20/x  +  ln 1/4
                             = ln (20/x)(1/4)
                             =  ln (20/4x)
                             = ln 5/x

so the condense form of  ln 20 + 2ln1/2 - ln x  is   ln 5/x