Question

Calcule : log5 625 + log 100 - log3 27?

Answer 1

$log_5625+log100-log_327=\\ \\ log_5625=a \rightarrow 5^{a}=625 \rightarrow 5^{a}=5^4\rightarrow a=4\\ \\ log100=b \rightarrow 10^b=100\rightarrow 10^b=10^2\rightarrow b=2\\ \\ log_327=c\rightarrow3^c=27\rightarrow 3^c=3^3\rightarrow c=3 \\ \\ \therefore \boxed{log_5625+log100-log_327=4+2-3=3}$

Answer 2

Resposta:

Alternativa D) 4. pode crer