Question 993984

If b = log 4, then b = 2 log 2 or log 2 = b/2.
Then
log sqrt(18) = (1/2) log (18) = (1/2) log (2 x 3^2) =
(1/2) [log 2 + 2 log 3] = 
(1/2)(b/2) + a = 
a + b/4