Log2+log20-log5+log50-log4=

log2 + log20 – log5 + log50 – log4 =
log2 + log20 + log50 – log5 – log4 =
log2 + log20 + log50 – (log5 + log4) =
log(2 x 20 x 50) – (log(5 x 4)) =
log 2.000 – log 20 =
log(2.000 / 20) =
log 100 =
log 10² =
2 x log10 =
2 x 1 =
2

maka, log2 + log20 – log5 + log50 – log4 = 2