Question

1) sendo log 2=X , log 3=Y e log 5= Z . determine :
a) log 15 = , b) log 18= , c) log 30=

Answer 1

log2=x
log3=y
log5=z

a)
r=log15
r=log(3.5)
r=log3+log5
r=y+z

b)
r=log18
r=log(2.3.3)
r=log2+log3+log3
r=x+y+y
r=2y+x

c)
r=log30
r=log(2.5.3)
r=log2+log5+log3
r=x+z+y