Question

Calcue os logaritimos , usando log 2=0,3,log 3=0,47 e log 5=0,7

A)1,5

B)log 10^5

C) log 2^3 na base 5

D) Log 125 na base 3

E) Log 3 na base 2

Log 5 na base 5

Answer 1

Ola Aninha

log(2) = 0.30
log(3) = 0.47
log(5) = 0.70

A) 

log(1.5) = log(3/2) = log(3) - log(2) = 0.47 - 0.30 = 0.17 

B)

log(10^5) = 5log(10) = 5 

C)

log5(2^3) = 3log(2)(log(5) = 3*0.30/0.70 = 1.2857 

D)

log3(125) = 3log(5)/log(3) = 3*0.70/0.47 = 4.46809

E)

log2(3) = log(3)/log(2) = 0.47/0.3 = 1.5666...

F)

log5(5) = log(5)/log(5) = 1 

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