Question

Calcule 2 Log 5 base 10 x log 2 base 5

Answer 1

Resposta:

$2~log5\times\log_52=\\ \\ 2~log5\times\dfrac{log2}{log5}=\\ \\ \\ cancela~~log5\\ \\ 2\times log2=2log2=log2^2=\boxed{log4}$