45. log b sqrt 7x

Question

46. log b sqrt (3/y)

Could someone please explain these?

Answer 1

45.
log_b √(7x)
= log_b (7x)^(1/2)
=(1/2 log_b (7x)
= (1/2) ( log_b 7 + log_b x)

do #46 the same way,
except recall that log(A/B) = logA - logB