Question

Considerando log 2 = 0,3010 e log 3 = 0,4771, calcule :
log 5
log 72
log 0,0001

Answer 1

log5=
log 10= 1
5=10/2
log 5=
log 10/2=
log 10- log 2=
1-0,3010=
0,6990


log72=
72=2.2.2.3.3=2^3.3^2
log 72=
log 2^3.3^2=
log 2^3+ log3^2=
3.log2+2log3=
3.0,3010+2.0,4771=
0,9030+0,9542=
1,8572

log0,0001=
log 10^-4=
-4.log10=
-4.1=
-4