Question 302147
Note that square root is to the power to 1/2

log base 18 7squareroot of x/y
= log18 (7) + log18 [(x/y)^(1/2)]
= log18 (7) + (1/2)*log 18 (x/y)
= log18 (7) + (1/2)*log18 (x) - (1/2)*log18 (y)