(ITA - 2018 - 1 FASE)Se log2 = a e log5 = b, ento
(ITA - 2018 - 1 FASE)
Se log2π = a e log5 π = b, então
A
\(\frac{1}{a}+\frac{1}{b}\leq \frac{1}{2}.\)
B
\(\frac{1}{2}< \frac{1}{a}+\frac{1}{b}\leq 1\)
C
\(1< \frac{1}{a}+\frac{1}{b}\leq \frac{3}{2}\)
D
\(\frac{3}{2}< \frac{1}{a}+\frac{1}{b}\leq 2\)
E
\(2< \frac{1}{a}+\frac{1}{b}.\)
