Question

log3 raiz quinta de 81

Answer 1

a) Log (32/64) =   log 1/2
          2                      2

Log 1/2 =  x  ==> 2^x = 1/2 ==> 2^x = 2^-1 ==> x = 1
      2
===========================================================
b) Log 81^1/5  = x
          3

3^x = 81^1/5 ==> 3^x = (3^4)^1/5

3^x = 3^4/5   ===> x = 4/5