Question

considerando log 2 = 0,3010 e log 3 = 0,4771 calcule :

a)log 72

b)log 200

Answer 1

log 72 = 1,85733  log 200 =  2,30102

Answer 2

log 72 = log (2^3 * 3^2) = 3 log 2 + 2 log 3 = 3 * 0,3010 + 2 * 0,4771 = 0.903 + 0,9542 = 1,8572 log 200 = log (2 * 10^2) = log 2 + 2 log 10 = 0,3010 + 2 * 1 = 0,3010 + 2 = 2,301