Question

considerando log2 = 0,301, log5 = 0,699 e log3 = 0,477, então log450 será igual a:
a)45
b)0,667
c)2,500
d)2,653
e)2,454

Answer 1

R: Letra D

veja

$\log450=\log2.3^2.5^2=\log2+\log3^2+\log5^2= \\ \log2+2\log3+2\log5= \\ 0,301+2(0,477)+2(0,699)= \\ 0,301+0,954+1,389= \\ 2,653$