Question

(Use para Log2=0.30 ; Log3=0.47 ; Log5=0.69 ) Calcule:
Log 0.5
Log 20 + Log 40 + Log 1600

Answer 1

log 0.5 = log 1/2 = log 1 - log 2 = -0,3

(log 20 = log 2 + log 2 + log 5 = 0,6 + 0,69 = 1,29
log 40 = log 20 + log 2 = 1,29 + 0,3 = 1,59
log 1600 = log 40 + log 40 = 3,18)

log 20 + log 40 + log 1600 = 1,29 + 1,59 + 3,18 = 6,06