Question

if log2(x)=log2(a)+log2(b)-log2(c) then what is x?

Answer 1

log2(x)=log2(a)+log2(b)-log2(c)

log2(x)=log2 [(a*b)/c]

so x = (a * b / c)

Answer 2

the upstairs have made a perfect solution

Answer 3

lol..

Answer 4

it's chinglish really, in CHInese forum we oftener use the word 楼上，which means "upstairs" to refer to people who appeared before you

Answer 5

\[\large\boxed{\log_b p+\log_bq=\log_bpq}\\\large\boxed{\log_b p-\log_bq=\log_b\frac pq}\]